I've done more wild camping in the South than the North. The reason being is, I'm just not prepared to pay £15-£20 plus for a 6' X 4' bit of grass! The south seems to have more of this high priced sites I think? £10 a night is my maximum! I'm totally self sufficient anyway, I even have a shower head with me, plus a toilet so in reality I don't even need a site. I use them mainly for meeting people, or because they have a bar and/or a restaurant, like for example a really good one on the West Highland Way. I always hike alone and sometimes the need for human company is important to me.