I like Open Country and Sub-Alpine. I hunt only public land and most of these areas receive heavy hunter pressure.
From my experience in archery, camo works period.
Recall back when I wore Woolrich pants, shirt and/or jacket. Green, gray colors.
Elk would come along the trails, stop and stare at me. I hadn't moved an inch and wind, sunlight was in my favor. Deer would look my direction, stop, sometimes approach and stomp their feet. Often both would move off, allowing me to move & draw. Sometimes they moved off too quickly for a shot, being on alert.
my first use of Open Country was in timber. Lots gray trees and ponderosas too. Group elk came down trail, closer...closer....closer. Lead cow stopped and looked my way but only for a moment. My eyes were focused downward, looking at elk from under hat brim. Then lead cow looked off. As if she looked right thru me and no reaction from her or the other cows, calves. 14 elk total.
Finally all walked by me single file on the trail, B]from my position off trail!!
then past me they got my wind, hair went up on lead cow's back and off they went like a freight train thru the timber.
the 2020 AZ OTC buck in my avatar, spotted me 3 days earlier. I had on my Open Country having hunted the desert earlier that day. Buck came out on the trail from thick manzanita brush 100 yard away, stopped at field's edge and instantly looked my way. Stared at me for several minutes, then cowered, snuck back into the brush. Only to come out again 400 yards away on another trail. Wind, sun was in my favor. I was sitting with my back against the brush but not blending well. During next few days, switched clothes to the Sub Alpine camo. It blended better with my brushy background. Buck came out on same trail, never looked my way and started my direction. Buck stopped, turned broadside to go toward some does away from my position.
At that point, I sent an arrow at 67 yards. Buck sprinted 50 yards. Down on the ground, expired and all in less than 30 seconds after arrow release.
These are just 2 of many observations of my experience with camo. Bottom line, I believe the right camo helps. Taken many deer & elk that I think the outcome would have been different without camo.