If you can afford a camp site fee then you can afford a proper adaptor. Friends of mine are going for a mid week break to Salisbury next week and I fancied joining them. But it's £37.80 Per Night! In November! For parking on someone's gravel. They're 'avin' a laff. Trouble is, so long as people will pay that, the camp sites think they can get away with it. I have been on several cruises that cost less than £37.80 per night.