In reply to SteveOc:
Keswick campsites:
Castlerigg Farm, £14 per night (2 adults and a car). Nice, clean and quiet. Good restaurant onsite. There is another site opposite, but have never camped there.
Lanefoot Farm in Thornthwaite, £17 per night. Again, nice, clean and quiet. Can be booked on line. Might already be full.