Before booking with "Tied to Nature" for a long planned and highly anticipated family trip to Yellowstone NP for my family of 9, I did extensive research and received many referrals for a knowledgable and trustworthy guide service. "Tied to Nature" did not disappoint. Our guide, Brian went above and beyond to make sure our 2 days of tour included exactly what we wanted to see...especially the wildlife. His extensive knowledge of the park gave us the opportunity to visit and learn about the most interesting park highlights while he navigated to the best wildlife viewing locations. My grandchildren were thrilled to see Bison, Pronghorn, Coyote, Black Bear, Grizzly and so much more. We could not ask more of a park guide...Brian was terrific. Even the picnic lunch which "Tied to Nature" provided exceeded our expectations! I highly recommend!