Thankyou Oliver. I will take a look at those websites. We thought we had found one that sounded lovely - Tyddyn Du in Penmaenmawr, North Wales but when we rang today to book we were told that they do not accept twin axles, so it is back to the drawing board!!These two websites provide lists of adult-only sites all over the place. I'm sure you will find one that suits you.
Olly .
http://www.tranquiltouringparks.co.uk/index.htm
http://www.ukcampsite.co.uk/articles/view.asp?id=122