At first I was doubtful of the spoiler: it was a first-time poster, much of the info had already been uncovered, and I always doubt the "cast or racer left something behind" spoiler. I'm still a little skeptical, but the vantage points do seem to match up with elephant butte. I used this
map and Google Earth to fly to the top of the butte for these crude caps: first, compare the road cap #24 with the view of Indian Route 42; second, compare the monument cap #30 with this shot of Merrick butte (see
photo) with the East and West Mittens in the background. And it's possible to land a helo up there: an account (
here, bottom of the page) of a commercial shoot gone wrong.