Just back from Batcombe Vale (somerset) - can thoroughly recommend. Lovely friendly little site with decent facilities. Good pub nearby (Three Horseshoes) and a good chippy too. They were very good about gently shutting down some of the more boistrous parents. Dog friendly. Ice cream van came round on Friday night which went down well in our household.
Both mornings daughter woke up and exclaimed how much she liked just listening to the birds (as opposed to aircraft and police sirens I guess). A really good first camping trip as a family.