Found this website earlier. it allows people to advertise their gardens for you to come and camp in. Although it is free to use the website I think that the garden owners do charge for you to camp. However, on reading the FAQ it seems that charges are kept pretty low.
I haven't actually used this website myself, so I cannot guarantee how good it is, but the concept looked interesting and I thought it might be useful to someone and they do seem to be all over the world.
http://campinmygarden.com/
I haven't actually used this website myself, so I cannot guarantee how good it is, but the concept looked interesting and I thought it might be useful to someone and they do seem to be all over the world.
http://campinmygarden.com/