Hothard, I'm sure you've seen this, but it is some add'l info on Lapergola for the site members:
View NamUs missing person case MP23008 for Robert Joel LaPergola, Jr. missing from Death Valley, California. Date of last contact: Apr 26, 1987. NCMEC case number: --.
namus.nij.ojp.gov
What has me scratching my head is why he would start a week-long hike at a spot so far removed from any resources. For a person hiking on foot in that country they'll need almost a gallon a day, and IF he had packed three gallons (about 25 lb.) it might have lasted him four days, at best. Don't even know if he had a backpack.
Also, records show that it was 106ºF that day, and it stayed hot for another four days. Nobody with half a brain is going to go "hiking" in that kind of weather, let alone for several days. It's one thing to work on your survival skills, but being a complete idiot about it is a whole different game.
I spent a lot of time in the area between Death Valley, Beatty and Goldfield back in the early 80's, and I'm sure many prospecting members have also been in that area, as well. It's no place for the faint-hearted and unprepared..in winter or summer.
If the temp. is dropping back into the high 70's at night, it would feel cooler, but worthy of a heavy jacket? Not from my experience.
Didn't see it in the thread, and am wondering how far (roughly) was his body from where he was dropped off?
Don't know if they'll ever find out, now, but my guess is somebody is lying.