What is the best camping in The Cotswolds?

We (couple) are looking for a camping in The Cotswolds for a couple of days. We are having trouble finding a nice camping on the internet.

• Semi-big tent
• We need electricity
• Water, Toilets, Showers etc.
• We like nature/trees/a river
• We would like to pay around £20 a night

What is the nicest camping you know in the area between Oxford, Gloucester and Worcester?

The Cotswolds (United Kingdom)   Cotswold District (United Kingdom)   Oxford (United Kingdom)   Gloucester (England)   Worcester (United Kingdom)