A coworker actually suggested this place, his wife and he have been going there for a couple years for Thanksgiving. It seems to be what you are looking for, nice place and superb food.
La Campagne
You may also want to inquire whether or not Bruno's Restraunt in Haddon Twp. (they list the address as Haddonfield though) is having anything for Thanksgiving. It's a great family owned Italian place and they usually have fantastic meals especially on the holidays. I know they do the seven fishes for Christmas Eve, so they may do something for Thanksgiving as well.