There was some confusion at the visitor center. 11 of us had paid for the tour but no one came to take us to the bus that was parked around the corner so we missed the 10am tour so they had to partially refund our money and get us on the next bus at 11am.
Otherwise, the tour was great. We opted not to even get off but to return the next day to the stops we wanted to fully explore. We had a wonderful guide. She had a lot of personal stories that related to each location.