Blackburn head is no longer open due to the party idiot's,it kept getting trashed.Last I heard Keilder Head is closed temporarily due to the same thing.Wainhope is open as far as I know.As to the 4 wheel drive brigade,I've never come across them.You could check the u.k. bothies website also.I've walked from Roughside to Wainhope which was good,also from the Green to Houghton Green which again was pretty good