I think I'd be asking how does a disabled person drive a motorhome, change the gas bottles, empty the toilet thingy, get the awning out , convert the seating into beds etc?
Disability isn't always an obvious thing. There was an article last year about a young woman (I think she's 21) in Kent who was a blue badge holder. I can't remember what her disability was (either something to do with bowels or lungs) but she stated that majority of people thought she was perfectly fine and couldn't be disabled ... because she doesn't look disabled.
This doesn't mean I defend that motorhome owner.

, but this is annoying as it has a knock on effect with other people (like me) finding it more difficult to park around here. Ironically he only said the other month about how difficult parking is around here, then low and behold he decides to add to the problem!!