I was there Thanksgiving week 2012, staying at HRH. With Unlimited Express Pass, we had no trouble at all. Monday and Tuesday were nice. I thought Wednesday at IOA was the most crowded - more as the day wore on. Thanksgiving day itself at Univ Studio wasn't too bad at all. Fri was a relax day by the pool (planned that way with a fear for crowds) and we weren't there for the weekend.