A site we really like is called Diamond Caravan & Camping Park in Bletchingdon near Oxford. It's a small site, very clean and well maintained. I left a review on here, and I would recommend it.
Colin D,s recommendation is spot on,Diamond Park is almost at centre of triangle of OPs locations.Caranan clubs site at Blaydon is close and Hardwick Park at Standlake is not bad but nearer to Witney.
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets