We went on the Thanksgiving Fantasy cruise this past Thanksgiving and had a great experience. My son can still walk, but uses a wheelchair for long distance and to conserve energy (he has Duchenne) We did not have an accessible cabin and lesson learned! He had to get out of his chair and walk into the room and I had to fold his chair part way to get it in. We have an accessible cabin booked for our next cruise so that will not be a problem. The doors can be an issue, but most often someone is there and will hold the doors to the decks. For the emergency drill, the cast members dismissed the wheelchairs a few minutes before the rest so we had a head start on the elevators. The elevators mid ship will always be the most crowded and can be difficult to get on regardless of mobility issues or not. For the shows, we met a cast member early the first night and we sat down front. They took us backstage to get there. After the first night our seats were reserved for us

Both my son and the other gentleman transferred to the theater seats. We both thought that would leave the center wheelchair spot open for someone who could not transfer. The aquaduck is not accessible; however, the other gentleman that we sat with at the shows told us that he had spoken with guest services and they arranged for him to ride on 2 different mornings 30 minutes before the ride opened. He still had to climb the steps, but could go at his pace with no one in the way and his travel companions could help support him up the steps because no one else was in the way(my son went once with his sister and then decided it was too high up for him after that!) There are free sand beach wheelchairs for use on
Castaway Cay on a first come first serve basis. I used a stroller to get my son from the tram(there are wheelchair accessible trams) to the beach and he struggled, but walked through the sand to the water. (my bad as I should have just left the stroller onboard and let him walk the short distance to the sand wheelchairs or to the start of the beach and I could have carried him. There can be an issue with port stops if you have to tender instead of dock at the peer. Water conditions can make it unsafe to board a wheelchair onto the bobbing tender. It is easy on and off when you are docked(athough there can always be environmental conditions that may make things difficult) The Fantasy did have a pool lift and you just had to set up with guest services when you would need it(we did not use this but it was in the guide I had) the cast members in the clubs were great and they will do their best to include all children(but cannot help with bathrooming) I felt that the Disney Fantasy was very accessible and that the cast members do everything possible to make sure EVERYONE enjoys their cruise. We cruise on the Wonder in September, so I am going in with the outlook that the classic ship may not be as easily accessible because it has not had a major overhaul, but know that we will have a great time as the cast members always make sure that there is fun times to be had by all