We booked this about three months in advance. When the day came it was raining, thunder, lightning and snowing. We asked if we could re-book that we were going to be in the park several days. It was definitely no problem. When we did go it was a beautiful, sunny day. Josh was our guide. He provided bear spray, binoculars and trekking poles. He took his time and exclaimed everything we were seeing. He was very knowledgeable about the animals, vegetation and the park in general We had lunch that was provided by Josh on the bank of the Lamar River. We are both 72. It was a little strenuous for us at times due to how we had to reroute around the bison herds. It was a great experience that we would definitely do again.