If you like cruises, you will love the Oasis of the Seas! This ship has everything you could want to see, eat, or do for entertainment. This ship is great for families - there is a huge open section in the middle of ship on Deck 6, called the Boardwalk, which has a Merry Go Round, video arcade, ice cream shop, Johnny Rockets, a tequila bar and Mexican restaurant. This deck ends with a huge outdoor amphitheater, where they show movies and have water show with acrobats. On The food was also amazing. The evening dining was excellent. We also tried the Chops Grill premium restaurant option one night, and it was a very high quality meal. A couple of other notes about the ship - despite the size and large passenger number, I actually found Oasis to be better than prior cruises in terms of organization, so it did not feel crowded. We had no trouble getting food in the restaurants, getting towels or pool chairs, or getting on/off the ship in the ports - everything was very smooth. Also, the ship is amazingly clean. There are staff members everywhere constantly working to keep the ship tidy. The best part of the experience to me was the crew - they are extremely helpful and friendly. Our steward made towel animals for the kids every day - which they loved. The dining staff are outstanding. My only complaint with RC is technology - their app is nice, but could be better if they made it interactive with your itinerary and let you use it to book excursions and appointments. Also, ditch the sea cards in favor of wrist bands.
Royal Caribbean owns Labadee, and it is basically a big island playground for cruise guests. Take one of the trams to any of the various beaches and enjoy water sports, zip lining, swimming, or sunbathing. There are cabanas at most of the beaches for rent. The bar is great. And they take your seapass card. They also honor drink packages on the island. The market area is interesting. Lots of local arts, crafts, local rum and liquors, etc. Be sure to bargain for the best deals.
Wonderful stop for food, history, and culture. There is a great Starbucks right up the hill after you exit the dock and cross the street. Power up and enjoy walking around the streets of Old San Juan.
There are lots of things to do on St Maarten. Maho Beach is a popular attraction. Cabs are plentiful, and can be picked up right at the port. But be aware the the traffic can be bad on the island, and it may take some time to get back to the ship. Plan to start returning to the ship at least 2 hours before the ship departure time, to ensure you don't miss the boat.
There are some activities in the Port Canaveral area, but plan ahead - parking in the garage leading into the cruise terminal can take some time, and is first come/first serve. Plan to arrive at the ship by lunchtime.