We've done both (PS's and no PS's). We've been happy with both.
If you are "spontaneous" and don't want to be locked in, but still want to eat a traditional T-day dinner and you are in MK, don't laugh, try Cosmic Rays.
Three T-Days ago, our family of 4 ate for $37.73 (yes, I looked it up on the receipt).
The meal included: Turkey, Filling/Stuffing, Mashed Potatoes, Green Beans, Jellied Cranberry Sauce and 4 medium soda's.