Im thinking the 1900s era photos are a much larger format and nicely mounted they show up in antique stores ect and hence have become an area of interest for collectors, similar to RR and military subjects.
I think the 1940s-1960s deer camp photos are out there but not for sale. photos of "granpa" and "Uncle Bill" are in a photo album or tacked up on the wall of camp. We still hold personal memories from this era and very few photos have gone the way of yard sales and estate auctions yet.
Collectors get excited to see Winchester model 1895's and long barrled side by sides carried by old men with big mustaches. We are the ones that get excited by the Winchester 88s and Marlin 336s, the Red Plad and jones caps.
The photos and stories are out there.
