We were there Aug 30-Sept 5 (Mon Sept 1 was Labor Day). The Sat and Sun before Labor Day were relatively crowded...some waits 30min to an hour. After Labor Day though, the parks cleared out and it was GREAT. We walked on most rides with no wait at all, and with it being so hot, the smaller crowds made a huge difference. We did all of MK in a half a day. If you can go the week of Labor Day, you really don't have to deal with the crowds.