I'm looking for information from anyone who has taken this tour. Did you book through Carnival, or an independent excursion company? What was the price for the tour? How many hours long was it? Also, I recall seeing someone's comment about NOT doing this tour if you have a bad back. Three of us in our group have one form or another of lower back pain, at times - not chronic debilitating problems. Could potential problems be avoided by simply slowing down over the bumpy roads?? My cruise is only 5 weeks away, so I am anxious to get my tours lined up. Thanks!