Thank you everyone for your suggestions, I really appreciate it. My mom is pretty much set on Coronado Springs, but it's good to know there's sufficient room even if we decide on another location. We plan on getting two rooms so worst case scenario I can put one in each room if it comes down to it.
I think they're both feeling self conscious about trying to maneuver the vehicles onto the buses, especially if there's a line of guests waiting on them which is why I've considered a Skyliner resort as well. I've heard pros and cons but least they're easier to get on and off when going to Epcot and Hollywood Studios.