What days are best to go to the water parks?

We don't give crowd ratings for the water parks because we don't track wait times there as vigilantly as we do the theme parks. We did a study a few years ago that showed the best days to visit were weekends, followed by Wednesdays. The theory is twofold--many guests arrive and depart on weekends and no one starts or ends at a water park. For Wednesday, we think it's the locals and semi-locals who would prefer to take a Monday or Friday off for the water park rather than a Wednesday.