Cheryl: couple of personal suggestion:
Nassau - Aquarium at Atlantis Resort Casino - do it on your own, don't bother with a ships excursion, just take a cab either land or water over to Paradise Island and Atlantis - the aquarium is quite amazing.
IFyou want to do the beach - i would suggest booking the ships excursion to Blue Lagoon.
St.Thomas - Hit the beaches!!! there are some beautiful beaches on St. Thomas proper and also some gorgeous beaches over on St. John Island.
go to
www.vinow.com. We like to go over to St. John in the morning, get in some beach and snorkeling time, then we will come back to either Havensight or wander around downtowan and do some shopping. Make the time to take the Paradise Point Tramway - you can walk to the tram from the pier.- St. Thomas you can also do on your own.
St. Maarten - again hit the beaches! - Orient is the most popular (one section is clothing optional. Lots of good restaurants on the beach. Dawn beach is also very nice, a bit more low-keyed.We have also done the Golden Eagle Catamaran sail - what a blast, and gorgeous scenery. Another really fun excursion is the America's Cup Sailing Regatta - you get to sail on a racing sailing yacht in an actual race. St. Maarten has some really good shopping.