We went just for a day when DS#2 was 8 weeks old. We normally wouldn't have done it, but it was a big family event with out of town relatives. It was definitely slower paced than normal, and we headed back to the hotel at about 6:00 PM where we normally don't leave until closing time. I spent a lot of time with the baby while DH took older DS on the rides. We didn't bother with baby swap, although we'll be doing the swap this trip (baby is now 1).
The baby care stations are very nice. We spent a nice amount of time in there, cooling off, eating, and changing diapers. The CMs who work there are wonderful! They do sell baby items there, but it'd have to be an emergency purchase - everything was VERY overpriced. Bring plenty of your own diapers. If you are breastfeeding, there is a wonderful room there only for nursing mothers. It is quiet, low lighting, and has comfortable chairs. Be warned, though, that they will not let you bring your stroller into the baby care station, so you have to carry baby and everything you need in your arms.
I don't know what time of year you're going, but let's face it, it's always hot in Florida, so keep that in mind.....little babies don't always handle the heat well. Do lots of cool, long things - Hall of Presidents, Small World, Country Bear Jamborree for example at MK.