I'm writing this in the spirit of reciprocity to all the other poster's on this site. Information here I found to be accurate and helpful, so I'd like to give back and whatever..

I was staying for 7nights, 6days, alone, for the sole purpose of making money. I am a 24yr old, aggressive and creative player. By no means the best at every table, but usually one of the more skilled players (3yrs of casino exper.) Any advice I give should be taken with this in mind. I took $1600 American as a bankroll. I am Canadian (so like around 2000 canadian). My first time in the US for an overnight trip.

I went with only 3 of 7 nights with a hotel booked. So, i planned on getting poker room rates when there. First time in the US, I arrived at 11pm on friday night. Took a $11 cab ride to the MGM. Arrived after midnight.

MGM: Signed up for players card. Comp rate=$1/hr. Dealers swipe card at table.
Buy -in 200. Leave with 820. Up 620, in 4.5hrs.
My first table in vegas. As expected, after settling down took advantage of some drunks and weak-passive players. Built up a nice stack, then cruised for 2 hours to qualify for a poker room rate. To reward myself, I get a room at MGM for Saturday night. Great rate of $109 dollars. Decent room, lots to see and do. Eating is expensive though.

Around 6am, walk down strip for the first time.
There was a WPT event at the Mirage, so I walked all the way from MGM to Mirage. Unfortunately, nothing was going on. Seriously. One table of 1/2NL going, short handed. Some idiot takes me for $50, and I leave after 20 minutes. Tables were old and dirty, room was cramped and dingy. Dingy is the word. Maybe with more people the atmosphere might change, but I guessed I went at a bad time. I noticed a sandwich platter set out for players, which I was prob. too late for.
Mirage: Buy in 200, peak at 220, leave with 150. Down 50, up 570 for trip.

Walk down street to Caesars, around 8am Saturday.
Caesars: Sign up for players card. Sit down, buy in for 150.
This room is the antithesis of the Mirage, and restores my momentarily-dimished faith in Vegas poker rooms. Huge, spacious, it's nice. Very isolated though, so the room feels like it could be anywhere (none of the Vegas eyecandy, like lions or club-rats). At this time, only 1 1/2NL game. Unlimited buy in, but I was getting tired so did a small buy. Played solid for 2hrs, took advantage of tired players. Leave with 517, after peaking around 600. 2 hours.
Up 367, total up 937, in 7 hours, on my first night.

Head back to hotel, devise game plan, rest and recuperate.

Sat. Night.

Start at Mandalay Bay.
2/4NL. Sign up for comps by paper/pen at the desk. $5 for 4hours.
Min/Max buyin of 200. At the must-move table, I lose 50, which sucks, b/c at the main table there are big stacks, big blinds, and I can't top-up past 200. Long story short, I lose my chips in 2 hours. My first re-buy in Vegas! I end up playing another 4 hours, get a free sandwich at the adjacent snack-bar, and work my 200 to 452 dollars. Up $52, in 6 hours.
Room notes: Nice, professional room, on the walkway to several clubs (i.e. beautiful people walking to and fro). They use halfdollars for rake purposes, which usually find their way into tip jars. Can't listen to music at table, cause of proximity to sports book.

Take deuce bus to Wynn, around 2am.
1/3NL, unlimited buy. 100bills play, $3/$2/$1 chips. Sign up for players card. they have 8/16, 10/20, and 15/30 limit games too, which I should've dabbled in more.
Buy in 200. Leave 0. Net up 789/14.5 hours.

Wynn is a nice place. Wide, 9 person tables. Best looking waitresses. Best drinks (double grey goose and crans). The downside is that on average, there are more dangerous players at the Wynn. Granted, you still find profitable players, but you have to be careful.

MGM. Head back to the gravy train. they have a 2/5 NL game going. I buy in for $400.
Leave $1140. 3hours. Net +$1529/17.5hrs.

2/5NL is an aggresive game. If you have problems making $100 calls with second pair, and wouldn't know when to do this, then stay away. If you can afford to gamble knowing your odds and having the capability to act on your reads, then this limit can be very profitable, because bluffing becomes a greater part of the game. The game can be described as loose pre-flop, aggresive post-flop. I did well; sophisticated play, which was a pleasure for once.
After table broke, went to 1/2NL for half an hour, won $50 dicking around and went to bed after 24hrs in Vegas up $1579/18 hrs. Nice.

Sunday daytime I play at MGM again. I rebuy twice! It happens to anyone, so be prepared. If you can't take losing (with an even temperment), poker's gonna be frustrating in Vegas.
Buy in 500, Leave 760 in 4hrs, up 1839 after 21 hrs.

Monday is an active day.
Start at Bellagio in the morning. I play in a $130 satellite for their daily tournament. Don't get a ticket, wait 1hr for 2/5NL (when they finally opened a new table). I have to rebuy at Bellagio, 2/5 is min/max 200. So, if you lose one big hand, you're in trouble. Pray that the stacks at your table aren't too big.
I work my next 200 though, play tight-aggro and leave with 834. Up 2143/26 hours.

Room notes: Bellagio is nice, and you can feel poker in the air. Big games going all around. Money flows like cheap beer. This place induces people to make calls/bluffs they shouldn't, as if the setting demands extraordinary play. Some people play too aggresive here, and get caught. Although definitely don't run into the ignorant, can still find profitable players here. Room management is haughty, but professional. Use paper lists though, so you never know when you're getting on.

Next, I walk across the street to Paris. This poker "room" isn't a room, but a roped-off section literally inside a bar. the play is terrible, frustrating, but if you want to grind, you prob. could here. My 1/2NL table breaks, but they radio over to Bally's and save me a seat there. They use the same chips and everything. Buy 200, leave 20, 1 hour.

Bally's again isn't a 'real' poker room. The upside to these types of places is the softness of play. All it takes is one blackjack player to stop by and throw some chips around to make your night (which happens tonight). I leave with $550 after 3 hours. up $2493 after my first 30 hours of play in Vegas. Definitely a higher hourly rate than I average at casino's back home.

next I go to Venetian. Again, a nice new room whihc is attracting more players now due to concerted marketing campaigns. I would recommend going to the Venetian, for sure.
I play 1/2NL for an hour, and win 119. I am seriously tired though. Lots of walking and 100 degree heat. I decide to play in a sit'n'go for 65 dollars, to minimize my risk and kill a little time. Structure is better than average, but lose one key hand and am blinded out.
I am now staying Downtown at El Cortez to save money. This place is SKetCHY!! but, i got a 3 night stay here for under $30 a night (expedia sale). I def. don't feel safe carrying $4000 cash in my pocket, getting eyed up by crack ho's and their pimps. avoid night time. Rooms are fine though. Poker table was laughable, and i'd be scared to take their money. Up 2547/31.5 hours.
Great buffet at Main Street Station Casino. 6.50 in the morning. Great Value.

I checked out the Nugget and Binions, but really, why bother? I don't know, just me, but poker's poker and I might as well play in a nice place. I was the youngest one downtown. Nothing of significance to report.

Tuesday, played at Wynn, 2/5 no limit.
Disastrous start, top-up twice after 2 hours. End up breaking even, but it was not good. Drank too much. Buy-in was an embarrasing 800, left with 840. Up 2587 after 37 hours. I asked about poker room rates (to get the f* outta downtown). Quoted midweek at $129. I reserve wed. night at the Wynn.

Head over to MGM, play 2/5. Lose $400 in 15 minutes. Playing against loose, drunk, fun, aggressive, and skilled table. i.e. could be disastrous, could be very profitable. I am half-cut myself, after having had about 9beer over the night (note, high alcohol tolerance is a major plus for the old table image). I work my next buy-in to $1200 over the next 3 hours.
Up $2987/after 40 hours.

Go over to excalibur, which was a joke. One 1/3? NL game. I'm sure I could dominate, but not worth the waiting list. I played the spread limit 2-6 while waiting. This could also be profitable for low-limit grinders. I would def. recommend, but a depressing shit-hole of a casino overall (excuse my elitism).

Wednesday. daytime. I'm now staying on the 59th floor of the Wynn, overlooking the strip, for $129. They treat you right at the Wynn. I went to Mandalay, but it was dead. No 2/4NL going. I left after playing 2/4limit for a half hour.
Back at the Wynn, I play 2/5NL, for 6 hours, go from 500-920. Got seriously drunk though, drinking the aformentioned grey goose cocktails (7 doubles, plus 6 beer). Instead of retiring to my fantastic bed, I stupidly head over to the Venetian (around 10pm). Up 3407, after 46 hours.
Alcohol and the week are catching up to me at this point. Looking back, this is a serious danger of going alone to Vegas (not a prob. for most, I know. But for serious players, self awareness is key). I was in no shape to play.

I play 2/5NL at Venetian. Have to rebuy, total $900. I leave though with $400 remaining, which was lucky. Back down to 2907/50 hours.

I get some sleep and now it's Thursday afternoon. My flight leaves friday morning at 6am, and I don't have a hotel room for the night. I'm burnt out of poker, but kill time at Caesars and the Wynn for my last day. Lose net 100 over 5 hours. up 2807/55 hours.

Go to watch a movie and spend last night at MGM. I had a great time there, broke around even and just watched some basketball and stuff.

So, Vegas NL can be very profitable, but next time I'm going with a buddy to keep track of one another and keep each other in check. Totals, up 2738/60hours. Notice my last 15 hours of play were seriously negative (-$45 an hour or so). This is terrible and eminently avoidable. Could've been up $4000 for the week. Not all weeks will be this good, but fortune favoured the bold on this particular occasion...

ecetera...
Mandalay Bay poker room rates suck (over 200). Bellagio's are decent (149), but not as good as the Wynn.
Best Staff: Wynn
Best Surroundings: Venetian, Wynn, Caesars
Best Overall: Wynn, Bellagio, Venetian, Caesars
Avoid: Mirage (I think..)
Best Vegas eye candy: MGM, Mandalay, Wynn
Best to find Amateurs: Bally's, Excalibur, Paris, MGM.
Ghetto fabulous: Dowtown baby.

There are infinite varieties of tables in Vegas. At any casino you can run into a super-soft table, or a super-tough table. Just know where you are more likely to run into which. i.e. Wynn is more likely tough, but MGM is more likely soft. That being said, which situation suits your style? If you like people to fold to your big bets/raises, and hate getting sucked out on, then avoid drunk-fests. You have to know how to play against loose tables to make it profitable though. You can't just play super tight, cause drunk doesn't mean stupid. Most reviews I've read on this site are accurate, so you can trust them on the little things (speed of service, niceness of tables etc...).

Always get a players club card though, cause it adds up. The nicer casinos have good varieties in beer and cocktails, so don't settle for American piss-brews (ahem, bud...). J/J, but not really.

Oh, I played the $330 tournament at the wynn. Start with 3000 chips, 25/50 1st level, 45min. levels. In other words, a great mid-high buy in tournament structure. I must have missed a session or two, cause I did go like a month ago but my weekly totals were correct. Hope my reviews and advice bring back fond memories or help you make new ones. good luck! congrats on reading this boring-ass trip report. see if you can beat my week!