If you are planning a trip to Yellowstone National Park, be prepared. Yellowstone hosts around four million visits each year (as of 2016). Most of these visits happen between the months of May and September, but people do come to the park year-round. I first traveled to Yellowstone when I was eight years old. My dad was taking classes in Wyoming in the 1970's and we spent as much time in the park as we possibly could. In 1970, it was estimated 2.2 million people visited the