I'm in Minnesota, visiting UM to access their library archives which (conveniently) houses both Bill Cooper and Don Lawrence's archives. I'm here to see what I can find to help us relocate the original 1916 plot locations on our expedition this summer to Glacier Bay as part of a National Geographic grant.
The archives are extensive, containing all sorts of interesting imagery - it's quite stunning to see 1) how many pictures there are of the plots and surrounds in the mid-1900's and 2) how useless those pictures are for relocating the plots. Vegetation just springs up like weeds - alders, pines, willows... There's a lot of useful material as well - some excellent handsketched maps with precise bearings (though it doesn't say, I believe they reference magnetic north rather than true north) and distances - we should have a fairly good chance of relocating the plots. That's assuming that the corner pins or monuments are still present, of course.
The plots were last visited in 1988, so it's been almost 30 years. That's the longest in-between visits that has ever occurred, unfortunately. It turns out (and this only came to light via the archives) that Lawrence and the NPS marked the plots with a redwood plank and a large iron rod, in addition to the corner pins. There's also, apparently, miscellaneous wire and things around - so we'll bring a metal detector...
Some journal shots below. My favorite entry was quite common - many a journal entry starts with "Steady rain all day."