Ahoy, Sonia!
I'm always happy to answer a question about my favorite place on earth, Disney Cruise Line's private island,
Castaway Cay. It's such a beautiful place, and for me, the ultimate in both fun and relaxation. Guests can choose to be as active as they want on the island, with lots of great
Port Adventures to choose from. On the other hand, there are plenty of lounge chairs/umbrellas, and even some hammocks where you can just relax and chill if you choose. I've done both, and there's no wrong choice when it comes to how you spend your day in Disney's island paradise!
When you rent a float or tube for the day, you can pick them up at Gil's Fins and Boats, Flippers and Floats, or Serenity Bay. No need to worry about that 10am reservation time, as you'll be able to pick them up at any time and at any location you choose. If you have other activities you'd like to participate in throughout the day, no worries, you can drop off your float or tube at the most convenient location and pick up another one later in the day. The night before you visit Castaway Cay, you'll receive a map of the island in your stateroom, along with a Personal Navigator (a detailed newsletter with times and locations of all the fun activities each day). The map will show all of the locations where you'll be able to pick up/drop off your floats and tubes.
I hope this helps with your planning. Have a magical day! - Diane W.