The issue with renting your own boat is that often the hire times start at 8am, way after all the boats with all their folks have gone out and chased the manatees back into the sanctuary - i dont care what they tell you and how the video tells you or even that FDEP/F&W folks are there, the folks still chase after them. I just tend to drift off a way from the crowds barely making a movement and the manatees come up to you as do the schools of fish - same with practically any other creature.