In addition to above there are (in Edale)

http://www.upperboothcamping.co.uk/

(very close) http://www.fieldhead-campsite.co.uk/

or if you want to be out of Edale, try

(Hope, 10 mins drive) http://www.lanesidecaravanpark.co.uk/

(Bradwell, 15 mins drive and good chippy and pubs) http://www.edentreecaravanpark.co.uk/