Welcome aboard, Alan! Castaway Cay is one of my favorite beaches in the entire world. Once you arrive there, you'll understand why! Since only Disney Cruise Line guests get to enjoy this spectacular beach, it's never crowded, there are plenty of included activities and events going on all day long, there is delicious food included at Cookies BBQ and Cookies Too BBQ, and there you are in your private island paradise in the Bahamas! It doesn't get much better than that, Alan!
You're welcome to use your own snorkeling gear in the
Snorkel Lagoon at Castaway Cay. As you mentioned, though, guests are required to wear the supplied bright yellow life vest when snorkeling in the lagoon area. Just pick one up at either Gils' Fins and Boats or at Flippers n' Floats. No charge to borrow the vest. This vest can be inflated to your preferred floatation amount by manually inflating it with the tube. Then, head out to see what surprises Disney has hidden under the sea for guests to spot! If you're on the hunt for Hidden Mickey's you won't be disappointed!
Have fun as you continue planning for your exciting sailing with Captain Mickey and his crew, Alan! Stop back if you have any other questions!