We will be visiting Tortola (arriving in Roadtown I think) in mid-March for just one day from cruise ship. How far is it from the ships dock to the town - is it walkable or shuttlebus. Is there much to see in Roadtown and what is the nearest beach like. Can't decide whether to do our own thing and stay local or book on one of the trips so we see a bit more of the island. Any opinions anyone?