The stories you mention aren't in Current Archaeology, they're in the Sept issue of British Archaeology. The same one that I mentioned earlier:

http://www.themodernantiquarian.com/forum/?message=220463&thread=19966

The geocache must have gone by now, because the walkers' cairn was in the middle of the barrow and the barrow was excavated down to ground level. (There's a pic of it with the walkers' cairn removed.)

"After excavation of vulnerable features, the site was covered with geotextile and prepared for grass regrowth."

:o)

Baz