Cheapest I could find was at the Excalibur (9am-11am-1pm daily) $35 buy-in, no re-buy or add-on. Start with a $300 stack, 15 minute blinds 5/10 to start. Very quick game, about 1.5 hours to complete. Pretty cool. Placed 5th in first tourney for $56. Didn't place in second tourney. Top prize was $350 in 1st game and $500 in second. Cheap/quick and pretty easy to play. If you can get some chips in the first 3 rounds, you can almost just sit and wait for the All-In fest for the final rounds.
As for the rest of my trip, wasted the first 2 days on carnival games and slots
before I figured out my hotel (Golden Nugget) and most others have a $2/$4 limit game. And I didn't find out about the $35 tourney until the second night. Once I found those I had much more fun :-)
I would buy in for $20/$40 and get up to $100/$150, then go back down. Playing those games you need to make sure you have something. There is no bluffing as people will call you to the river on a draw... and usually get it... I guess the casinos are rigged like on line play :-)
My worst beat/play (my fault) was a K high flush with the A on the board, figured it was mine, other player had a boat (didn't see it). Even though it's limit, there's no max amount of re-raises when you're HU. Lost about $40 in that hand.