We are thinking of doing the catamaran snorkeling excursion in Nassau and lagoon snorkeling in Castway Cay. My sons are 9&6 and swimmers - we spend most of our time at the pool or beach during the summer. I know they provide life jackets. I've seen some people say the best snorkeling in Castaway Cay is further away from the beach - am I being unreasonable that I don't see this being a problem with the kiddos?