Two years ago we spent Christmas Day at MK and it was almost a ghost town in some places. Of course, the temps were in the mid-40s, it poured from about noon on, and it was pretty windy, too. I'm sure none of the locals who were planning on going were there as well as families with very little ones who didn't want to brave the cold and rain.
We're planning on heading to AK this Christmas Day. I've read previously that's it's pretty empty (although I'll be interested to see if EE makes any difference). We'll be having dinner at 1900 Park Fare.