Thanks all - v. useful. At the moment it looks like being just 13st of me in a 180HP Archer, so I should be OK! But I'll note the advice on slopes &c.
Unless it's horrendously hard to spot I'll probably be OK without the photos (one can get an aerial photo on Multimap anyway). I think the RAF Radar Station might still be there (it gets a mention in the VFRFG, anyway).
Tim