We go the Friday after Thanksgiving through the following Saturday. That weekend is busy!!!! But starting Sunday afternoon the crowds drop right off. I mean like 5-10 minute waits.
MVMCP starts that week and all the christmas decorations are up. The Osborne lights are on. It's the greatest time to go. The following week starts Pop Warner. And I heard that can be crowded, but not that crowded. We have always taken the kids out of school, just because it's less crowded, decorated for christmas, and starting that sunday or monday(can't remember which) is value season. I think this is the best time to go!!! It's still warm enough to swim, but not to hot that you are sweaty all the time. We usually wear tshirts and shorts during the day and grab a sweatshirt for night. Only a few times have we worn pants at night. But...we are also from upstate NY!!!

That makes a big difference!!! Good luck deciding!!! We will be there Nov 25 - Dec 2.