Work hard not to pay for a room....call different places and keep your eyes open as you'll be surprised how cheap you can get a good room.
Throw down as a group on one or two 4-7 bet sports parlay at the start of the trip....only bet "locks" and time it so you can watch the last game as a group in hopes that you'll win big on it.
Craps, craps, craps....bet the Come big (best odds in Vegas).