My family was given a gift of a Caribbean (on Royal Caribbean) cruise and my 10 year olf daughter wants to swim with the dolphins on Tortola (we also have a 4 year old). Can anyone tell me if this is a good idea? IF not, any suggestions? We are also going to the Bahamas and St. Maarten (but other than Atlantis, don't see any dolphin encounters/swims). Please help!