Try Ocen Village, both boats have a number of disables cabin, and they seem to be wheelchair friendl.
I am not wheelchair bound, but I travelled on RCCI Several times, They would have needed traffic lights for the wheelchairs! ENJOY your cruise.
I can personally recommend both Thompson's Spirit and the Celebration. The cabins are large with good bathroom facilities. Both these ships have special reserved places for the disabled to sit and watch the shows.Getting on and off the ship is no problem,always staff to help at the gangways. Princess cruise are also very good, we are trying Ocean Village in November. Hope you have a good tim.
RCI has fully equipped rooms for disabled travellers, and also things like hoists so you can get in the pools. Very well thought out.