North Wales is anti Motorhomes/Campervans and nearly all have restriction between 11pm and 8 am maybe due to the long stayers parked on the seafronts over the last few years , Mid Wales , Brecon Beacons (Powys county council) you can stop in their car parks and overnight although no services , South Wales not sure as i have never stayed there . The Fylde coast on the other hand caters for Motorhomes/Campervans. Lytham, St Annes ,Blackpool (yes Blackpool) Fleetwood all have car parks with dedicated spaces although no services apart from a sluice (£1) in one of the car parks at St Annes.