I like the site in the Duddon Valley, but that's miles away... There are three sites around Great Langdale, all get a bit overwhelmed.
The Duddon Valley site, near Seathwaite – the Duddon one – is great. Relatively quiet, ten minutes from a nice pub, beautiful scenery. Basic facilities, but what the heck. Also quite like the one at Patterdale, righthand side of the road as you head north, by the Lake. Can get a bit midgey, but nice enough. Not that keen on the Sykes one further up the Pass, always feels a bit industrial to me.
Bascially, the further you get from Ambleside and Windemere, the quieter things are. Duddon is still bearable at bank hols when places like Langdale and Wasdale are overwhelmed.