Pretty much all the Disney restaurants serve the traditional Thanksgiving dinner. I would stay away from the intl restaurants at EC as they do not usually serve the traditional meal. The most popular restarant for Thanks is Liberty Tree, so I would consider other options, especially with a large party. Thanks at Brown Derby was very good. We have always enjoyed the wonderful holiday meal they serve at Yactsmans Steakhouse and they were especially helpful with our large party. You also might consider Artist Point, Citricos, Boatwrights or Whispering Canyon.