Trip tommorow, how to not get fatter?

Will be leaving for NY tommorow. There is only one thing that I fear about this trip. No, it's not getting shot by some crazy yank. I'm worried about the food. 12 days without gym will really threaten all my efforts to try to get slimmer during the holidays. Perhaps I should wear as much as I can in the snow just to add up to my body weight, hence more effort needed to drag myself along, thus using up more energy and burning up more fat in the process. Anyhow, I hope that the hotel we will be staying at will have a gym. For now, let's party for new years eve!