We encountered a solo wheelchair user on our last trip. Actually the lady was using crutches and rented a wc to go to Fantasmic. I don't know how she got up to the show but on the way out my DH spotted her struggling to make one of the many inclines. She was rolling backwards, people were just stepping out of the way and going around her. My DH walked behind her and grabbed the chair while saying I have you. He said he would push her if she would like. Well she was very grateful. DH pushed her to the wc rental area. Some of the terrain throughout WDW would be difficult if you are not use to rolling yourself.