Hi DisneyPoly, I'll bet everyone will be fine, the children always do better than the adults do. I've never seen a young child get sick, and besides that, we are in port alot of the time. We didn't book any excursions through Disney. In Key West, we're going to wander for a while and then enjoy the ship. In Cozumel, I believe we're going to go to Mr. Sanchos's Beach. I've heard it is alot of fun there. And in Grand Cayman we're also going to beach it. We get bored on the organized tours. I tried to book one excursion and it was sold out already. Because of my 6 year old, it really limits the excursions. We tried to book the jeep excursion, but the youngest you can be is 10. So, we'll just enjoy the sand and beach....