My husband and I (in our 50's) are going on a Panama Canal cruise in February and would like to sign up for the Sting Ray excursion in Grand Cayman. In past cruises we've never been on an excursion where we would be getting in the water, so we are not sure how to dress when we leave the ship. Should we wear swimwear underneath shorts/shirts and carry along water shoes? Or will we stop somewhere we can change? Is there a place to store our dry clothes while we are in the water, or where do we leave things? We will probably do the Ship Sponsored excursion. I'm also trying to determine if I need to purchase and take along water shoes or will we need them? Any advice anyone has to give us on this type of excursion we'd appreciate. Thanks!