I had pulled over to get my bearings, since two out of three of my maps claimed I had driven off the edge of the world and into an uncharted blank space. Suddenly, there was a rattling at my passenger door. I looked over to see a weather-beaten drifter-type who had attached to his belt a Crocodile Dundee-style "That's not a knife, THIS is a knife" murder-death-kill weapon. Naturally I had no choice but to roll down the window to see what he wanted. He angrily demanded to know what I was drinking and then accused me of being Davey. The key thing, though, is that he didn't know where the cemetery was. I never did find it, but was able to later determine when I looped back around that this guy is apparently living inside an abandoned an empty oil storage tank. I was probably right on the verge of "Jeepers Creepers" or "Wrong Turn" territory, but my failure to be a nubile twenty-something girl was likely what saved me.
I suspect that I actually almost DID find the spot. If you go all the way down this unnamed road, you'll reach a spot where there's a closed gate to the left, an open entrance through the fence straight ahead, and a closed gate to the right labeled "Camp Bethany". I believe the cemetery, if it extant, and at least one of my sources believes it is, is as little as 200 feet off to the left. However, while I was parked at this spot, considering my options, the dude that lives just down the slope drove up and suggested warily in a "Get the hell out of here" kind of way that access to the cemetery is via Oil Field Road to the south...which proved to be non-true.
At any rate, there are enough red flags here that I would be cautious in exploring past this point. And since the cache is nowhere near the purported location of this possibly-mythical graveyard, you can turn right back around here and head back to the main road without further incident.