Usually April with hook-up, then from May without, but that's only because I've got a C*mperv*n for winter, I wouldn't be able to go all year without being on a campsite. But I've just got a new tent and don't think I can wait till April to use it, so I'll be watching for some unseasonal early sunshine. It was very warm early February 2008 so who knows?
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.