See the pic. in my profile of Old Faithful erupting with a bison in the front. I wasn't sure how I would fare for 4 days of constantly traveling but I know positive thinking helped me get through this and I've loved almost every moment. I say almost because airlines can be a real pain, especially when you miss a connection. All I can say is Yellowstone in the winter is magical and I would highly recommend it to any nature lover. This is something I've wanted to do for the last 25 years and I'm proud of myself for this big accomplishment. More about the positive thinking in another post from me.