It was many years ago, but we had DS on a cruise (and our other 3 kids). He has Autism and Down syndrome, no real conversational speech.
They could not really take him in the child care club. They seemed uncertain and nervous. We left him once, for maybe an hour, they were willing to "try". But we had concerns about him not understanding taking turns for the computer, what if he got upset? (he knew about turn taking in general, more or less, but this was a new place and who knows). Also we had him use bathroom every 3-4 hours, and they would not help him with that at all, not ask him if he needed to go, not help adjust his clothing after he went. (I understand why they could not accommodate him, I was just mislead by a
DCL CM before our trip, that the child care was trained to handle special needs kids. So I was not prepared.)
Sad to say, we did not enjoy the (3 day) cruise with DS. the other 3 kids had a blast. I had some trouble pushing him around the ship (he was 6 months post ankle fusing surgery), and tired easily, I think I just had a McClaren for him. Trouble with doors, and the lip on the floor from outside to inside. DS would tire by 8-9 pm. DH and I took turns walking the ship alone, while the other parent stayed in room with DS. Not fun, really.
Castaway Cay was tough too, DS is very fair skinned, and could not walk in the sand, etc.
Good luck, this was over 10 years ago, things might have improved. The Disney Parks suit us better, but that is just us. DS likes the rides and attractions at the parks.