We were there for Labor Day weekend in 2003 and would not do that again. It was so crowded that weekend. We were in MK and every ride was over 50 mintues and the park was packed. We checked out on Labor Day and was told that at our resort, All Star Music, there were 1,000 rooms checking out. Now that was just 1 resort. Those maids were going to be working triple duty that day.
All I can say if you go then, good luck and have patience.