Antigua I can help with & maybe others can help with the others. When you get off the ship in Antigua there will be a mass of taxis/vans. A very popular trip is Nelsons Dockyard, Shirley Heights, (look on the web), a drive through the rain forrest & do stop off at one of the 360 beaches for an hour on the way back. A good day to remember.
Following on from Bill…. Bermuda ... The dockyard there is quite interesting with glassworks, shopping and snorkelling. You can also take the ferry across to Hamilton, not very expensive, and wander around the town. It can be very interesting to get a taxi, there will be loads by the ship, and let him take you to various places around to the lighthouse and there are some great beaches there too. There are local buses which are fairly reliable and you can get the Island map and a timetable off the net. Ponta Delgada is a great place and you either need to hire a car or get a taxi to see the interesting bits. I would suggest that you look at the ships tours and decide what you would like to most see and then go with a couple of friends in a taxi. The sulphur springs in the Fumas Valley and the viewpoints was a good trip for us. Go on the net and look at the tourist sites for these islands, that will help and take a look at other cruise review sites too. .... Neil.