The closest campground that is open is probably Bozeman Hot Springs.
It's already deep winter there, the roads (except for the north road they try to keep open year around) are all closed. This is the only part of the park currently "open", the rest re-opens Dec 15, and then access is by snow-coach, snow-machine, ski and snow-shoe only. Other then the north entrance the closest you can get to the park is the parking lots outside the park.
The predicted high at Old Faithful today is 15(F) with up to an inch of new snow, up to another inch is predicted tonight with a low a 7(F)
