We booked this tour knowing we had only one full day in Yellowstone as part of our road trip and wanted to be sure to get the most out of the visit. It was described as a small group tour of no more than 8 people. We visited the week of May 16th, before peak visitor season, and consequently our party of 3 were the only guests on the tour! Our guide David was nothing less than amazing in his knowledge of the park and attention to our needs. He is a teacher by education and had an excellent balance of facts and anecdotes about the park and the region to keep us engaged the whole day. We thoroughly enjoyed his company as well as his skills as a guide! This experience was worth every dime spent. If visiting Yellowstone is on your bucket list, even if you are travelling on a budget, make this tour a must-do. Like us, you likely spent a lot of time and money just to get to this amazing National Park. Why not make sure you get the most out of the visit? My 62 years of life experience has taught me that life rarely presents an opportunity to 'go back'. Make the most of the moment!!!