Outdoor Shore Excursions are usually good for cruisers you don't have to do anything other than sign up. .It is NOT a tour on a bus with 30+ people. In Private tours you can control the specific itinerary, change the schedule if you find you've seen enough of some site or want to take extra time, personalize the itinerary to your own desires...you can put together a small group up to 12 persons and share the cost...