Yeomans is the biggest at Ambleside and Mark is really helpful and can give you some great advice. Good display of Outwell, Vango, Coleman and Peakland.
There is also Kendal Camping Centre just outside Kendal at Endmoor (just off Junction 36, M6) - this is an indoor warehouse with a few Outwells tents here.
Ultimate Outdoors in Keswick has a few tents in the back again mainly Outwells.here
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.