My husband and I are looking into western vacations for our honeymoon. So far we've narrowed it down to Montana (MY top choice) , Wyoming or Colorado. I'm curious as to what there is to do in Montana in the winter. How cold does it get in February and March? I've heard that Yellowstone is closed in the winter except for a few roads for snow-mobiling. Would it be worth the trip during the winter/ early spring if neither of us Ski?