I checked the ressie system and the Fort isn't showing ANYTHING for Thanksgiving week. We did it four years ago - it was great but we made the ressie a year in advance.
The parks are packed too. You would think on Thanksgiving day itself that people would be eating turkey instead of going to the parks. But the parks are packed a 10 out of 10.
So don't expect to ride every ride and see every show in the MK TWICE on Turkey day. It's crowded so set expectations accordingly.