We just spent 4 lovely days down in Cornwall and the B&B I had found for us was absolutely fab.
Slightly remote (but then again as far as I'm concerned everything in a rural area is remote as I'm a towny ), lovely rooms, affordable, and the 'innkeepers' are absolutely lovely and fantastic. They even let my dd have a little stroll on their pony! Oh and they've got a play barn with a huge trampoline which I had trouble to get dd off and I also had to have go (ouch my old bones) oh and a washing machine in case you get muddy trecking through the fields etc.
this is the place and I give it 5*+