i was there for two weeks in the middle of june last year. waitlists on the strip were insane. easily 3+ hours at the big rooms (Aria, Bellagio) during peak times. I ended up playing mostly at the Rio (wsop area) since i could always get a seat. Worst case at the Rio was 20 minute wait. You should be able to get a seat in the big rooms between 4 and 11am, otherwise expect to have a bit of a wait.
Speaking of "wait" I can't wait to get down there and do it all over gain