This appears to be for car parks, and being 'motorhome friendly' doesn't always mean they would be overwhelmed. Take Ceredigion council car parks, they have a policy of banning motorhomes from most of the car parks, and charging extortionate rates for the rest, this is not obvious at first from their website, but turn up at a car park which says it takes 'cars, vans, and motorcycles', and you will find motorcaravans are banned, turn up at one that says it takes motorcaravans and you will find the minimum charge as £9.