It was a great day in Yellowstone and Grand Tetons with our guide Chance. After driving 8 hours from Denver the day before, what a relief to let someone else do the driving through the parks. We saw an amazing variety of animals - 7 grizzlies - moose - elk - bison. The geothermal parts were facinating, and the Grand Canyon of Yellowstone and the falls were worth seeing. Chance filled the driving time with interesting stories about the people who discovered Yellowstone, how the park was laid out, and previous tours he had led. I would do this tour, or a similar one, again any time.