We have been doing our own thing on cruises (to 6 continents) for about forty years and in more then a hundred ports. When folks tell us that they have fears of missing a ship our immediate response kids they should only take the overpriced cattle drives known as cruise ship excursions. Nothing we, or anyone, can say is going to put those fear demons asleep. As to us, we accept the risk and usually have our Plan B....of how we can catch the ship at the next port. And no, we have never missed a ship....but have sure come close a few times.