We frequently use the CC site at Notgrove (5 miles W of Bourton on the Water) as a weekend bolt-hole. It is a relatively small site, 50% hardstandings, no toilet block but has a dog-walk. Set in open countryside but sheltered. Great situation for walks in the Cotswolds.
you will fall in love with the area. moreton in marsh is beautiful and has a tuesday market. broadway is a chocolate box village that is so beautiful you never want to leave and bourton on the water is like a baby stratford but nicer.
if you do go to broadway if you get chance check out the cc site there very nice and huge pitches but only a small dog walk. there is also a cc site at moreton in marsh it does get very busy though and pitches arnt as big as broadway.