We had 7638 on the 3-day Wonder in June, so I can help you. The room is probably identical on the Magic. I wrote a 6-part trip report on the cruise board; will excerpt some of it here. We were two adults and two 17-year-old girls in the one stateroom. Instead of a wheelchair in Orlando I had rented an electric
scooter, which I picked up at the pre-cruise hotel and dropped off at the Orlando airport.
We took the very comfortable Disney transfer bus from Port Orleans Riverside Resort. Had to show ID to get on the bus. We had checked our luggage at the Port Orleans (had to show ID) and it reappeared in our stateroom. I was able to climb up the steps into the bus. If I hadn?t been able, they would have provided a bus with a lift. The scooter rode in the luggage compartment of the same bus.
Wheelchair Stateroom 7638
We had Stateroom 7638, a wheelchair-accessible room with a king-sized bed, a sofa, and a large veranda. A lovely room, with a large beautiful bathroom (single, not divided like the others) with lots of grab bars and a roll-in shower with a fold-down shower seat.
There was no trouble at all with noise or unpleasant vibration. In fact, I was disappointed by the relative lack of motion, because I like to be rocked to sleep at sea.
My electric scooter takes up more room than a regular wheelchair. Even though the room was much larger than a non-accessible room of the same category (Category 5), it was somewhat of a tight fit with the scooter and the 4th bed. The extra floor space was contained in a very large walk-in closet, which had wooden, louvered sliding doors which didn?t open enough to use any of that space for the scooter. I wish I had requested that the closet doors be removed; then I could have parked the scooter in that otherwise wasted space.
Another disappointment with the room was that the 4th bed, instead of coming down from the ceiling like an upper bunk over the sofa, was a Murphy bed which came down perpendicular to the sofa. Thus, the 4th bed completely blocked the door to the large veranda. The only access to the veranda all night would have required crawling over a teenager. Since one of my very favorite activities on a ship is to go out to the veranda during the cool of the night, barefoot and in my nightgown, to listen to the water and smell the air and watch the stars, this was a major loss.
The king-sized bed was actually too low for me since I have trouble getting up. As soon as we saw the room, I asked the room steward (Tara) to have an extra mattress placed on top of the original one to build up the height. The extra mattress was placed onto the bed while we were at dinner. Problem solved!
Castaway Cay
The water was clear as bathwater--very, very pretty. I explored the beaches briefly (rode my scooter off the ship and took it on the 2 trams all the way out to the distant adult beach). The walkways are paved and very accessible for wheelchairs. I?ve heard that Disney has special wheelchairs for traveling on the sand, but I didn?t look for them.
If you have any other questions, feel free to ask.
pjkds
but we nevertheless had a super time. 
