
Hello and good for you planning your first trip.. I would like to make one suggestion. You mentioned your Mother's disabilities and her need for a wheelchair. If you have not done so please think about getting a
scooter delivered to the resort for her use during the trip. Both Value and Moderate rooms have enough room to charge it when not in use. The company will have it waiting in the lobby on your arival and then pick it up from there on your departure. The one we used broke one night

and we had a new waiting on us in the morning without missing a beat.
There are several good companies providing this service in Orlando. Disney is HUGE, like several cities in a country unto itself.

It would afford her greater independence and save your hands from blisters pushing. We used this service in 2004 for My Father in Law who had never been on a scooter in his life, but needed one for the trip after having both hips replaced at the same time. He loved it...we would have carried him on our backs down there but he wated to tootle off on his own a little bit and did not have to depend on anyone to be there to push.
Consider how many bus stops are at each resort.

Port Orleans has several pick ups before they head to the parks, as well as Coronado Springs due to the size of these resorts. If you are going Value, Pop Century has dedicated buses to it where as All Stars buses sometimes stop at all three resorts. Moderate resorts have more space in the bathrooms also.
Have a great time planning and sorry this was so long