We had our honeymoon the week after Labor Day 2000, and it was MAGNIFICENT! The only real waits we had, were if we had missed the beginning of a show. We walked right on to most rides, or had a 5-10 minute wait at the absolute worst. We even did Space Mountain twice in a row without waiting at all! This is a super time to go...it doesn't feel deserted (I don't think that ever really happens), but you certainly don't have the crowd issues from mid-summer and holiday time. Temperatures averaged in the 80's and 90's, and rain was very short-lived. You'll have a blast!