We would like to do our own excursions in St. THomas. Do we need reservations for Blackbeard's Castle? I went online to the site and it mentioned reservations. I"m also not sure the cost. Also does anyone have an opinion if we could go to the Castle, take the tram to the Point and see Coral world all in one day on our own? If so, how would you do it? Thanks for any help? We're on the Destiny in June if anyone has more advice for any of the ports for us!!