Best times to go im my opinion...(and I have been at these times)
The entire month of September and prety much October as well.
From Labor Day weekend on is perfect for a few reasons. A lot of the schools have been started back up so vacations are over and then there is the threat of Hurricanes! (Peak time of hurricane season)
October, We've been at the end of october and it was slow. I'd imagin the entire month would be the same as well. The food and wine festival starts this time of year so the crowds pick up on the weekends. (I prefer going on weekdays for lower crowds)
December. You will be good up until about the second weekend then it starts to pick up! They film the Christmas parade the first weekend of December and if you go to
MVMCP, go during the WEEK, the first or second week of Dec. We went on Tuesday the 12th last year....VERY LOW CROWDS! Walked on everything and even rode Big Thunder Mtn. and the Rockets twice with out even getting off! We just went for another go around!
The beginning of January AFTER newyears week is low as well. Again, holiday breaks are over and vacations come to an end for most.
Hope this helped you out!