I will gladly second the pre-cooked turkey from Publix. We did this for Christmas this past year at OKW. It was very reasonably priced, included turkey, mashed potatoes and gravy, cranberry and orange relish and seems there was something else, too, can't remember and price seemed to be around $36.00.
Turkey is already cooked, sealed in a bag, packed inside another bag. You remove it from the other bag and reheat it in the oven for so many minutes a pound. It was delicious and easy. We prepared a couple of our family favorites to go with the whole meal. Everything was packaged so nicely for transporting back to the room, so there was no spillage. Our one turkey servied 8 with some leftovers.
I have to admit that I was a bit hesitant about ordering this way, but I would do it again without thinking twice. With a large crowd, you can also get their spiral sliced ham and some other sides. You can pick it up the day before and you have everything you need ready to reheat. Just make sure you call and reserve. My hubby picked ours up and he said there were probably 40-50 meals waiting to be picked up, so lots of folks do this.
This was a lot cheaper than we could have eaten out and it sure was more "homier" than herding everyone to a restaurant. I took Christmas placemats, etc. to decorate the table.