We've done the jet ski eco tour (scary! but fun), the Castaway Rays stingray thing, bike rentals, float rentals, regular snorkelling, and boat rental. All were fun, with the exception of being a mile from shore in the most shark infested waters of the Caribbean......I mean, couldn't the guide have held back on that fact until we got back to shore???
This October we're doing CC the way it was meant to be - all relaxing, all the time. We MAY rent bikes or a float, but otherwise we're going to explore the island and do some well-deserved relaxing.
On OUR cruise, though, I might go for the cabana massage......