We fully subscribe to the concept of "slow traveling". After all, that's what the For 91 Days project is all about -- dedicating sufficient time to each new destination for comprehensive exploration and total familiarity. So when we arrived at the entrance gate to Yellowstone National Park, it was with conflicting emotions. Excitement, surely, but also frustration. Here we were at one of the wonders of America, and we had a ridiculously tight schedule. Four hours. We had given ourselves just four hours to see one of the most amazing places in the world.