Sites that don't have set pitches, such as Kingsdown in Kent, Dernewood, Bedgebury, Nethergong, , WoWo, Fallowfields, Blackberry Wood, and others - often found under the 'wild style' or 'back to basics' sort of listing.
But you will not get EHU, and there may well be restrictions like no amplified music etc.
Probably way too far, but I’ll mention one of my favourite sites anyway: Drumroamin (near Newton Stewart in SW Scotland) has immaculate grass pitches that are 10 x 10m. And you can pitch / park any way you want (“except on your roof”, said the owner) so it need not feel “regimented”. Small independent site, but I agree with recommendations to join CCC for their Certificated Sites. CAMC generally don’t allow tents, or only without vehicles, and their small sites often don’t have toilets.
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