VS - just spent a day last week on the way back from a west coast sales trip. I've been to that city so many times i can't count that high, as most of the conventions for work that i attend are in that town.
#1. FOOD, FOOD, FOOD. Besides gambling (knowing you that won't be a problem), this city is all about the food. Everybody has their own favorites, but mine, by far and away, is Hugo's Cellar in the basement of 4Queens downtown. It is normally ranked by the locals at the top or damn close to it for restaurants. Try the Hot Rock if you go for an appetizer. Also, the wine steward (jon) is absolutely awesome to chat with ~ if you're into wine this guy is the guy to speak with. Other favorite joint to eat at is Picasso's in Bellagio. Very French, very "foo-foo" food but some very creative cuisine. As for other food, you can't go wrong with most of the buffet's on the strip ~ they'll cost you a bit but i haven't had a bad one yet.
#2. While the Hilton has been listed as the biggest, i personally prefer Caesars sportsbook for watching a game. With the NBA playoffs going on you're going to see great reactions from the crowds for those games. You'll have an absolutely fantastic time there.
#3. Nightlife. Yeah - be prepared to drop a ton of dough but get yourself into Tryst in the Wynn casino.
#4. Stay away from the strip clubs. Insane prices for everything from a soda to a beer or any mixed cocktail. It's just not worth it. If you want any, ehem, evening entertainment (don't know if you're bringing your girl), grab a limo (from just about anywhere) and have the driver hook you up. PM me and i'll send you over the company and driver i've used more than a few times.
#5. Sign up and get slot cards from all the casinos you visit and USE THEM. If you want a comp, ASK FOR IT. You've got to pipe up and ask for what you want. I've been turned down when i've had more than enough play sometimes, and there are time's when i've been rewarded with full RFB when i shouldn't have been. Overall you can qualify for the buffet's pretty easily but it could be some work to get the others.
#6. Drive the strip at night and just take in the sights. Or better yet, combine the drive on the strip with a limo and some everning, errr, entertainment.
#7. If you're crazy enough rent an Elvis Costume and walk around any of the casino's and autograph every as Elvis. It doesn't matter if your fat elvis or skinny elvis - just be Elvis for a few hours.
Other list to do:
Tommy Bahama store in Planet Hollywood mall
Margaritaville cafe in the Hilton
Bahama Breeze restaurant
freemont street experience
Top-less pool at mandalay bay
Dale Chihuly glass sculpture Bellagio Lobby
Flower display in the Bellagio right past the lobby
Fountains at Bellagio
Any Cirque-du-sol show
Check and see if there are any boxing matches going on and attend
Side trip (helicopter) to the Grand Canyon
Skydiving (real or fake - there's a spot on, i think convention center drive, that has the fake skydiving (where you fly over a large wind machine).
There is never a dull moment in Lost Wages errr Las Vegas