The tour was easy to book online. When we arrived at the dive shop, we were outfitted and prepped for the excursion with minimal delay. (We were there on a Tuesday in off-season.) Our guide, Darren, was knowledgeable and answered all our questions. He has 29 years experience on the river. He explained all he was doing, but also was respectful of our requests to move on to other sites. We made it up river to the springs and got to observe several Manatee in their natural habitat in clear waters. Thanks, Darren for a once in a lifetime adventure!