That alone makes me wonder, though. Hell, it didn't take that long to find Glacier Girl, and she was inside the middle of a freaking icecap!
Plus, wood or not, burried in a humid muddy soild would yield a pile of metalic rust by now. Especially if, as in the one recounting, they sank into the mud and were lost.
Honestly, when I read it some months back I was a bit hopeful, but highly dubious. Now? After that well reasoned article, I have doubts they ever existed.