I just booked Thanksgiving lunch at the Dolphin Convention Center. I asked the CM if any restaurants were doing anything special for Thanksgiving, preferably with characters and not in the park. The Dolphin CC is having 16 characters and a huge spread. It all sounded delicious, but don't ask me what was on the menu. More than just turkey, I can tell you that. Anyway they serve lunch from 12:00-5:00 and the cost is $42 for adults and $20 for kids (but that includes tax and tip.)
We have a party of 12 and they were able to get us all at one table so that was a definite plus.
We wanted to do LTT, but didn't want to waste a ticket after reading how crowded MK is on Thanksgiving.