We've been to a couple now both were CCC members only and very quiet. We've visited one 3 times this year and the latest one, which we stayed at Thursday night, we've booked into again in July. That one is 1/2 a mile from the sea on a farm with cottages. Slight road noise and the train track is near but isn't a problem and not through the night. Plus it's £5 pupn. Dss love the quiet ones. Don't get me wrong they aren't really quiet boys but they love the countrside and nature.
I was in two minds about joining CCC but am so glad I did. There are other sites I have in mind too for the future. We still like looking on UK campsite for places, especially ones behind a country pub for when it's just dp and me Although we have taken ds2 to one too when ds1 was somewhere else.