Your post sparked a memory of a story we read in a national magazine awhile back about "wreck chasers"--they are people who are in a unique subcategory in the broader avocation of aviation forensics.
Anyway, after we penned our first reply to your topic we went off and actually found an article on the topic in an Internet archive of Smithsonian magazine.
We think the original article we read was perhaps in the National Geographic Traveler. As esoteric as the hobby of "wreck chasing" seems to be, we are fairly certain it is moderately well documented in various media. Anyway, it's interesting to see it in the Smithsonian magazine.
We're suggest you contact the primary individual in this story. It is quite likely he can help you find the site immediately.
http://www.smithsonianmag.si.edu/smiths ... efile.html
We will continue snooping 'round El Net looking for various sources of info on both wreck chasing and aviation forensics.
Will let you know if we find anything more. Good Luck!
And God Bless Your Grand Parents!
This is a link found via the Smithsonian's website:
It shows the site of a B-23 crash on Loon Lake, Idaho. Ironically, the aviationarchaeology people are based out of Falcon Field in Mesa and give seminars on military wrecks. We'd betcha a dollar to a dime that someone there would know "right off" how to find your the site which you seek. Please let us know if these sources provide any value in your quest.