I have been to CC 2 times. Great trip both times even if the 2nd one was cut short due to Hurricane Noel. We snorkeled on our own at both SB and in the snorkel lagoon! It was awesome! SB is not really a snorkeling place but we did see some beautiful fish!! just like most said... take it easy dont try to do everything, you will feel rushed and unable to really enjoy it!
After reading this thread i am thinking about doing the stingray or grabbing a bike on my next visits.
What is the bike track like? Is it extremely physically demanding... can an out of shape person ride in comfort?