At the Grey Mare and Her Colts there is a shallow (deepening) valley between you and the path to Kingston Russel. DO NOT JUST CARRY ON PAST GREY MARE! We did, it wasn;t fun. Once you're pn the right path the largish copse is yer target.
Does seem a long way, but less so coming back... Kingston Russell is also a nice place for a kip on a warm day...