My family and I just spent our first Thanksgiving at WDW this past November. We had T-Giving dinner at the Brown Derby @ MGM and then headed over to the Osborne Lights. What was apparent to us during dinner was that it did not feel like Thanksgiving. There is some give and take here when eating a Thanksgiving meal, and expectations must be set in advance. My wife and I both had the Turkey platter, and it was very good. However, I was not used to not being able to reach over for a second helping of turkey or stuffing. You finish the plate and that's that! So, even though we were in the place where we love to be at while on vacation, we left the Brown Derby missing a little something on Thanksgiving Day that was hard to explain as a first timer.
I would definitely try the LTT, although it has been posted that all the PS's are gone within minutes of the time when reservations can be accepted. The LTT would probably get us over the atmosphere and the helpings of food that we missed at the Brown Derby. Since you're staying at BWV, I've heard that the dinner buffet at the Swan is very good for Thanksgiving. I guess that people will differ when it comes to tradition and their preferences for holiday meals. Some people are just as happy gnawing on a Turkey leg for Thanksgiving dinner while walking the park, and I applaud them for their love of WDW. To me it boils down to what your family prefers, and how much tradition you want to get involved in, especially when the parks are open late during this holiday. If I had to do it all over again, I would probably opt for a late dinner at Artist Point at the WL.