My serious answer is I have no idea. But, doesn't being in a restaurant sort of void it of its "traditional" status in the first place.
Harvest was the spot everyone had pointed to before (including myself), but it's not quite traditional. Good luck, let us know if you find what you're looking for as I'm sure others would be interested as well.
OK this is about a year late but as I contemplate Thanksgiving this year I reflected on what a great time I had last year. My wife and two small childres all went to Harvest for Thanksgiving dinner and had a great time. The food was very good and they had many traditional Thanksgiving dinner options. My kids were treated very well and really enjoyed the experiences. I don't know if they are doing it again this year but I would recommend it. In fact, my wife and I commented about how great it was to lounge around all day and have family time and then just go out to dinner instead of all the stress of preparing a big meal. A great experience.