Yes, because if you charter a boat, you determine who comes on board with you or not. Every boat has a maximum number of passengers, to which you have to pay attention – but except you (and, if necessary, the skipper, if you rent a boat with skipper), only your own guests will be aboard. This is why exclusive charter is also a bit more expensive than public boat tours, but in exchange, you’ll have the boat entirely for you and you can decide yourself, where you’ll be navigating and when and where you’ll be anchoring.