Just a follow-up to this,
We’ve just got back from a weekend at Turner Hall campsite. Cheers to martinhutch for the suggestion.
Didn’t take the bikes in the end, weren’t up to it; got a bit of peace and quiet to chill out instead. Site was miles away from buggerall, but pretty much what we wanted. The campsite had a bunch of small fields rather than one big one so with a bit of judicial planning we had a field to ourselves in an otherwise fairly busy site.
The pub ten minutes’ walk away had three or four real ales on and simple but tasty home-cooked food, and friendly staff.
Great chilled weekend, loved it. Thanks again for the tip.