will arrive in St. Thomas on cruise ship on 10/31 for the day. I've contacted at least 5 of the recommended (by this site)sail/snorkle charters. Seems every one is out of the water until Nov 1 for maintenance, except 1 that is already booked. I'm not big on shopping, and traveling companions not big on long hikes. Suggestions for activities? I know the crusis ship will have options, but I was hoping no to book through cruise line.