Go the last week of Sept.!!! We did this this past year and I have never seen it so empty! There were mostly no waits on any rides and if one said ten min. it really wasn't. You just walked right on. The parks themselves were also empty just walking around and Disney transportation was never full on any bus or monorail or boat we got on. The night we went to Epcot we walked up to Illuminations starting at the last minute and the railing wasn't even full. Even the bridge between England and France had very few people. It was almost weird. We were leaving on Sept. 29 and people were pouring into the Beach Club to check in. Once I was home I started reading live reports to see how busy it had gotten and it sounded packed. You can look up trip reports from those dates and see the difference. I am trying to go in Jan. next year because I hear that is the only time that can compare to Sept. crowd levels. I have been the first week in Dec. and the second week in Oct. in the past 3years and nothing compared to Sept.! Good Luck