Good luck in Vegas. The MGM has two tourneys a day-one at 1100 am and 7pm. The blinds double
every 20 minutes. Gets crazy near the end as the blinds go from 1500/3000 to 3000/6000(+ante)! When I go there I cash on a regular basis(1 out of 3/4). There tourneys have alot of 1st timers and tourist. The one at 11 am is like $65 and the one at night is $80. You get more chips at night to start and there are more people playing. These touneys take 2 to 4 hrs to play. There cash tables are some of the best in Vegas. Alot of people all the time.
If you want some better tourneys check out Caesar's or the Venetian. they both have deeper stacked tourneys with better structure. They run in the $120 dollar range. The both have big card rooms for cash also.
Here's a link you can check out if you want. Not sure how up to date it is though(Caesar's didn't seem 100% when I checked). Hit details and it will show you the tourney layout.
If you go downtown check out Binion's.
Best of luck to you.