I'd love to see the pics of PSR!
Trail Canyon was open when I first went to DV in 1969. Unfortunately, I didn't take the opportunity to go down that route. By 1974, it had washed out very badly, and was closed.
I do remember the picnic grounds, near the original Stovepipe wells. There was a road that lead there from both Hwy 190, and from Scotty's Castle road. The road from Hwy 190 was closed first, probably in the 1980s.
David Bricker / SYR