Best communal campsites for solo travellers?

Hey! I’m a part time van lifer and have struggled to be social during my touring as I end up on a lot of family sites.

Can anyone recommend great festivals, sites, weekends etc for solo campers with more of a communal feel? Maybe with live music and onsite pub/bar etc?

I’m in my 30s and like a mix of being able to socialise but also be solo.

I’m located in the South East. I was trying to get to Camp Bongo last year but my head gasket blew on the van so I didn’t make it - the group I was going with originally is now inactive and I’ve struggled to find alternatives that aren’t all about hiking (I have mobility issues)

Thanks in advance!