Heading to ST Maarten early August and having trouble deciding what to do. Leaning toward a catamaran tour but still not sure. I was wondering if this port is open to 3rd party vendors. Usually when available we get off the boat and pick something from the local tour companies. That way we know the weather and like that bit of spontaneity. (and yes, there are times when we book a full blown tour way in advance if there is something very specific we want to do.) But we have never been to St Maarten so not sure. Thanks.