Our ship woll be in St. Thomas until 9pm. I've never been to St. John/Trunk Bay and would love to go. Only problem is that St. Thomas is only "shopping port" on itenery and my wife wants some time to browse jewelry stores. Is it possible to spend 2-3hrs at Tunk Bay and still make it back to St. Thomas for her to shop the stores before they close at 5:00pm. Do they have showers and changing facilities at Trunk Bay?