I don't know that I have a whole lot to add to all of the wonderful posts here. I need to use a wheelchair at WDW, and am finding that I am needing it more and more often in other places. I have mostly dealt with wonderful cast members, and I really don't remember every having anyone treat me badly. I have found that when I am kind and polite to people, they usually return the favor(smile).
I still feel kind of sorry for the cast member who remarked that my shoes (a pair of fragile sandals) didn't look very practical for touring the parks, and when I laughed and told him that I could get away with wearing those kinds of shoes because they didn't get all that much use, he turned bright red and was so embarassed. I have not gone to get a GAC, as the wheelchair assistance is usually all I need, although I may have to do this in the future, as my sun sensitivity (medication caused) is getting much worse, and I'm afraid I'll poke my spouse in the face if I use a parasol to keep the sun off(smile).
The one thing that I do wish, is that Pleasure Island had accessible restrooms that my spouse can come into with me and help me. The nearest one is way on the far end of Downtown Disney, and it is pretty difficult for us to make it there and back very quickly. We've been reduced to having to find a darkened area for me to inject medication, and wondered how on earth I was ever going to explain what I was doing if a security guard showed up (smile).