When you got off the ship, what direction would you go in? How would you have any idea what was offered or how to get there or how long it would take?
That would a part of the whole thing... when you get to your mystery spot, you would find out where you were, and they would give you a list of possibilities, along with maps, information, etc. Either the night before, along with a way to sign up for tours and such (perhaps a lottery so you would find out in the AM if you got it if there were limited spots) or some other such thing? I Don't know, just thinking off the top of my headachey head here!