[Closed] Campsite recommendations for bank holiday weekend please

I really need some help to keep all the family happy....

Granny and Grandad have a motorhome and are used to fairly clean and, to my mind, up market sites. Camping and Caravanning Club.

The rest of us will be in tents and prefer cheaper. Decent shower block for the girls. Pub would be nice.

Wife and daughter like a beach. I like mountains but happy with anywhere as long as it's not too busy (wishful thinking on bank hol, I know). I think we'd all prefer quieter.

Location: Wales or South West probably.

Thinking Pendine Sands or somewhere near Exmoor.

What can you recommend please?