I always feel like the weekdays should be less crowded since FL residents probably go on Friday and weekends. We went on a weekday last year--I think the Monday after Thanksgiving, and it wasn't very crowded at all.
I was trying to use my theory for
MNSSHP this year! Since we'll be there for Halloween, I'm guessing everyone will want to go on the 31st--and maybe Sunday the 30th will be slightly less crowded.