This flyer came with the 1962 Yellowstone booklet and was clearly updated annually. The insert describes five different possible tours, all of which took 2-1/2 days and all of which cost $56.45 (about $325 today), including bus transport, hotel rooms, and meals.
By 1964, Union Pacific had stopped operating trains to West Yellowstone, so all tours start and/or end at Ashton or Victor, Idaho. The Victor terminus allowed people to enter through Grand Teton Park and leave through Yellowstone Park. Presumably, this was also offered when trains went to West Yellowstone, meaning less time spent on a bus.