Grandpa, in my world, was my great grandfather. He was born in 1888 or 1889. He was a 2nd generation immigrant, first in his family to finish college. He turned around and put his 2 brothers and 1 sister through college. Grandpa was a business man and life long poacher. His family had hunted to keep food on the table through the depression and that's just how things were done even after the depression ended.
Grandpa hunted in near business attire. He generally wore gray/black tweed slacks and a similar sport jacket, a button up shirt, a string tie, and a fedora type hat. Oddly enough I don't recall his shoes.
This was pretty different than other sides of the family who were loggers, packers, and so on ... similar education levels, but engineering, not business. They generally wore outdoor work cloths ... jeans or bibs and suspenders, blue-gray striped shirt, and caulked (said "cork") boots. The closest to camo any of them got was my father who had a pair of tan or brown denim pants that he'd leave blood stained through hunting season ... he felt that the blood stain broke up the unnatural color and his human silhouette.
Camo ... I generally don't wear camo for medium game hunting in forest, I go for jeans, my old OD green carhartt blanket-lined jacket, often a flannel shirt under it, and my seriously worn Merrell Moab Ventilator shoes. We seldom see it get cooler than a faint frost during deer/elk seasons here so heavier / warmer gear isn't needed. If we get light rain, I use a camo / goretex jacket, if it rains hard I revert to OD green Helly-Hanson neoprene rain gear. That stuff is pretty well hidden in forest in heavy rain. I do use camo when I'm in the sage predator calling because any solid color makes you stand out. Right now I favor Cabela's "outfitter camo".
MIB