We booked a tour with Derek for Yellowstone in August 2020. He did not disappoint! My kids loved him and so did my husband and I. My oldest talked his ear off! Derek is an encyclopedia of knowledge about the area and took us to spots where we saw lots of animals including the rare sighting of a Grizzly and her cub! We got up early for that! We hit a lot of the main spots as well but Derek showed us some not so common areas that were quiet and spectacular! We would have never known these areas were there. I highly recommend doing a tour in Yellowstone with Derek and would absolutely do it again!