I think it depends on how close before Thanksgiving you are there. We were there once up until the 22 I think and it was crazy the last two days, plus it was really hot! I would go for the week after, kids are less likely to take off school then. I know when we were kids we would take the first few days off before thanksgiving to go. I would say go the Sunday after thanksgving and stay til just before the Pop Warner kids get there around the 3rd.
Have fun!