In reply to ewanjp:
There is a bit of parking at the top of Wintors, down the small lane (tells you how to get there on the UKC listing). Always see a couple of vans there, not sure if they overnight though, seems like it's fair game.
Alternative is to Google a couple of pubs in the area, prefer to stay at one of them to be honest. Hot food, lounge and beer in the evening is nice.