DH and I rent scooters. He is disabled; I'm just old. Anyway, we aren't allowed to be on Thunder Mtn together just in case the fire dept has to evacuate us -- they don't want to deal with more than one scooter person at a time.
Whenever we go on Space ship earth, they always ask DH is he could walk down several flights of stairs. (he uses a wheelchair/scooter at disney). He always says yes, but he doesn't say it may take him an hour or two. Now that would be an adventure! Ride would probably be back up again before we got down. LOL
My Mom has a scooter too. They always ask if she can do the stairs and she says yes, but it will be slow. And I mean very slow. And they always say - great, no problem.