They call them snowcoaches now, and use them in Yellowstone National Park in winter for transportation within the park, between Mammoth, Old Faithful, West Yellowstone...and smaller versions for coach tours.
Yellowstone in Winter
Yellowstone is a whole different world in winter. The campground at Mammoth is open all year, has the restrooms open, but no hook-ups. You would need lots of propane
for heat....but what a place to be! You can also stay in the lodges. Cars can access Mammoth Hot Springs, to stay in the lodge there, then you snow coach to the other lodges within the park. It is very interesting to stay in the outlying cabins at Old Faithful, then ski into dinner at the lodge nightly.