I was basically thinking 10 mile radius for the island.  I have no idea if that would be good or not.<br/><br/>I want to have it be large enough to put some space between it and the ferry (and consequently the hotel on the other side) if travelling by vehicle across the only road.  However, I don't want it to be crazy huge.<br/><br/>Apologies to people: I'm not honestly very good at this sort of thing.