This one in Wiltshire: Bush Farm Bison Centre have been twice now and had a great time. It's mainly woodland camping so great to practice the dark arts of tarpology!
Not especially cheap at £7 pp/pn but worth it (IMHO).
Some reviews on here: http://www.campingninja.com/bushfarmwoodlandcampsite
Not especially cheap at £7 pp/pn but worth it (IMHO).
Some reviews on here: http://www.campingninja.com/bushfarmwoodlandcampsite