I only spent one Thanksgiving and Christmas away from family, during a tour to ROK. However, growing up as an Army brat, my career NCO Dad had a special routine on the holidays.
He would have my Mom cook a ton of food, and mid-morning he would go to the barracks and see if there were guys who had no place to go. We always had a houseful, and one year he took my bedroom door off and put it across some saw horses to make another table. That year we also had some ARVN troops who were stateside training. Everyone was welcome regardless of race, religion, or national origin.
My wife and I did the same when I was stationed at Ft. Knox, but on a smaller scale.