The wife and I visited Santa Fe last year, and we drove up to Taos and around. Trying to find some box of gold in that landscape would be like trying find the proverbial needle in a haystack. And in this case there’s thousands of haystacks and one needle.
Well, he may have buried a treasure box in NM, but all of his clues point to a spot on the planet nowhere near NM. They all line up (and there are even more allusions to it in his poem) so I don't think it is a coincidence. Maybe *that* location is where he left a note saying where to find the box in NM. Clever. Totally obscure but fairly obvious if you've been there.