Hi Michelle,
I would say that the
Liberty Tree Tavern in the Magic Kingdom Theme Park is by far the best place to have a traditional Thanksgiving Dinner at Walt Disney World. Its 18th-century colonial feel and delicious patriotic plates makes for the perfect location for a Thanksgiving meal.
There is a fantastic post about the best restaurants for Thanksgiving at Walt Disney World on the unofficial website The Disney Food Blog which you can find here:- http://www.disneyfoodblog.com/2009/09/21/best-restaurants-for-thanksgiving-at-disney-world/
You can also find out which restaurants offered a traditional turkey day meal previously on the
Disney Parks Blog post from 23 November 2010. Based on previous years, Biergarten Restaurant, Le Cellier, Steakhouse, Coral Reef Restaurant and the Garden Grill might be possibilities in Epcot Theme Park.
As you would expect, dining reservations for popular times of year book up very quickly and so I would advise you to make your advanced dining reservations at your earliest possible opportunity. Reservations can be made up to 180 days in advance online or by calling (407) 939-3463.
I hope that this information has been of help and wish you a magical trip!