My girlfriend and I went on a full day winter safari in Yellowstone. Derek picked us up from our hotel in Bozeman and drove us down to Yellowstone. The whole ride down we learned about the Yellowstone 101 and some of the animals we might see. Once we got to the park, Derek was able to find us all the animal highlights: wolves, coyotes, pronghorn antelope, elk, bison and big horn sheep. It was a great day and definitely the highlight of our trip. Derek was a great guide, easy to spend a day with and full of knowledge about the park and wildlife. I would definitely recommend this tour to anyone, especially those who are truly interested in learning about Yellowstone. Thanks Derek!