It would appear that I might have been hasty in my condemnation. There might be something there after all!
The first thing I had done was fire up Google Earth, go to the coordinates, and then move the perspective view up so I could see the mountains behind it. And, it didn't look anything like the picture, so I knew the coordinates were wrong.
I threw some wood in the stove, patted the dog, then decided to fire up the Google Earth flight sim, and fly up the canyon. I hit CTRL-LEFTARROW a couple of times to look out the "side window" while flying along. When I got about a half mile upstream from the coordinates, I could see I had arrived:

I moved around until I thought I could tell exactly where the picture was taken, then concluded there wasn't anything there, and said as much. However, I didn't realize that I was too far up the hill.
I just now thought to look at the historical imagery. The 1989 B&W photos actually show something there. I was right on centerline with the strip, but I was about 500 ft. too far up the hill. That error was mostly due to the fact that Google Earth has a slightly wider angle view than the camera lens.
So, the coordinates for the lower end of the strip are at 42.65655, -118.60225. It's at 7065 elevation, and the strip appears to be just under 200 ft. long.
I hope I didn't ruin anyone's excursion!
