As far as the OP I say search for the backpackers club
http://www.backpackersclub.co.uk
They have a list for members of farmers who allow camping on their land. Some include drinking water and are very helpful. Sounds like what you want is around in alimited format. Personally I don't want to see your proposal. The idea of people camping with fires in a lot of places does give me cause for concern. I completely believe fires, apart from in controlled Kelly kettles or stoves, should not be commonplace. Just my opinion because once one group sets a fire with permission it might lead to others setting fires in the same location.
BTW wildcamping is permitted in a very limited set of areas in England. IIRC there are certain wildcamping spots in Northumberland too. The Lakes has an informal, high level, low impact wildcamp acceptance. I've never had a landowner complain or stop me. I know a few locations Outward Bounds use regularly (and trash a bit too but that's just my experience of coming.inn after them).
Take the fire out of the equation and use tread lightly approach you're probably not going to be kicked off if you're in upland areas and are discrete. PS forget about using yellow or red tents too. I have a photograph of a Lakeland tarn with my large tarp pitched. It's seen from a hillside next to it and despite being 100m away you can't see anything of my tarp. It was in.a flying v which probably makes it more obvious. I've seen mates pitched up with laser tents, even 2 tents close together, and they're very discrete. Add a fire and at night.you're visible again. Same pitch as my tarp site above I could see down to Grasmere and right at the opposite end to the the village there was a group with a fire. I could see them from the opposite side of the village to Grasmere the body of water and they were the other side of the mere. Talking miles away.