Lou. LTT is an great place for TG dinner, but like you, I'm not so sure I want to be in MK that day (way too crowded).... You've got a few weeks to decide, before the 60-day PS window, but probably only hour(s) to actually book. TG dinner at LTT will sell out fast.
Last year we didn't book our dinner until about 1 month prior, and had to "settle" for the YC/BC Convention Center... In fact the buffet there is outstanding, although the atmosphere is not very homey.
Suggestion: Book a non-park restaurant ASAP... If you decide later to go for LTT, then change your ressie. The longer you wait, the more limited your choices.
Good luck!