This is indeed a lovely spot. It was one of the stopping points on a brief tour of the area at the Ancient Sacred Landscapes Network conference in summer 2000. Nice to see that even though there were clearly solstice campers coming through the area, the Smithy site was relatively free of trash (not so Avebury or the orchards at Glastonbury, sadly...)
I hope to hike all or part ofthe Rideway track this summer when I visit, and will certainly be spending time in this location; White Horse Hill and environs is my favorite place on earth.