Daveās Canyon Tours was very well organized, and our guide, Tim, was outstanding! I went with two friends, there were four others in our group. Tim was energetic and highly engaged, and he spoke fluently, sharing an amazing range of information. No problems hearing him either, even in the back of the van. See if you can ask for him specifically. To anyone wondering if they want to spring for the cost of a tour, definitely do it. Besides the convenience of letting someone else do the driving, there is the educational aspect that deepens ones enjoyment.