Make sure to go to the Martini Bar above the Palms Restaurant. Also, try the snorkeling. It's really relaxing and romantic. You should really go over to the sports complex too. It's got a smoothie bar and infused water and it's just cool over there. A stroll across the property at night is also a must because the lighting is so perfect and beautiful. Enjoy. CSA is the best!
My advice is to plan nothing, don't fill your schedule. When you get there you can decide what you really want to do but you may just find that sitting on and walking that beautiful beach is all you want or need. Every year we say to ourselves that "This year we will do..." and every year when we get there we can't pry ourselves away from the beach.