We did it back in 2006. We were there the last week of September. The temps were in the 90's and high humidity (didn't bother us we are from Kansas). We walked onto most of the rides with probably the longest wait time being 15 minutes and that was only a couple of the rides. The restaurants were packed so you just need to make sure you have your ADR's made. We had a great trip and are planning to go back Sept. 2009.