In reply to chrissyboy:
Generally those to the west of the district are quieter - these days there's no such thing as a quiet campsite in the Lakes they all tend to be busy. The aforementioned Fisherground in Eskdale and Turner Hall in Dunnerdale are both good. There's also one at Nether Wasdale though I've not used it, it is very close to two good pubs.
The campsite at Buttermere is also worth a punt.