San Juan, St. Thomas, St. Marteen. We just did St. Thomas and St. Marteen in 2010 on the Emerald (our honeymoon). The third port then was Grand Turk. I've been to them all several times but you can't get too much St. Thomas! I've done the night sailing from San Juan a couple of times and always enjoy it. It will be a new experience for my wife. I envy you that third full day at sea!