Agreed. My parents live in Florida and go to the beach a couple times a week. But when my Mom sails with us we are one of the first people on the island and literally one of the last people to board the ship (we've had to walk bc the shuttles stops running). In addition to the beach we also love the activities on CC (DD loves the family whale dig) bike riding, and walking the island.I live in California, where I also have access to a beach year round, but there's something to be said for the beaches of Castaway Cay. Serenity Bay is my happy place. I would not DREAM (see what I did there?) of missing it!
Rainforest Room can be enjoyed at a leisurely pace if you decided to stay on board--
12/27/13 family went CC for the morning and returned after lunch to see a movie with about 15 other people. Frozen I think, anyone ever hear of it.Yes, plenty of things to do and the ship will be quite empty as well. You can check example navigators here for your itinerary. That being said, Castwaway Cay is almost an extension of the boat. Should you want an empty theater for a mid day flick, this is probably a great opportunity.
http://disneycruiselineblog.com/personal-navigators/