They are calling for morning showers on Thanksgiving!! Clear at night. Id say Epcot would be great in the rain in the early part of the day. Only Future world is open early (world showcase opens at 11) There is so much stuff to do insides at Innovations you could spend a few hours in there. Especially if you have kids. There is a place in one of them where you can send a free email home with your picture. Pretty cool! There is SPaceship earth, Ellens energy adventure, HISTH show, The Land has a bunch of things, And maybe the wonders of life pavillion will be open during the higher crowds weekend. Lots to do inside there, without much walking outside between places.