Best thing I've ever seen work is non-movement & "working the wind."
I shoot elk/deer fairly regullarly - "bow-hunting with a rifle" (tm) - at 20 yards or so in dark CO timber.
Even better than that, we've had elk/deer/turkey walk right through our hunting camp while we've been sitting at the camp fire - in chairs & yakking it up. Tagged a couple while just having a rifle at-hand sitting next to a camp fire.
I've shot elk/deer, in the trees, while either smoking a cirgarette, or sitting next to a smallish fire - just to keep warm.
Critters can only smell scents that are blown to them by the winds. Wind not blowing towards them = they can't smell 'em any more than yer Aunt EllyMay in the next county - no matter the lack of her baths.
That, & quit moving around so much! Critters spot movement - dead fast & quick as a ferret!
Spend all the money for scent-blocker clothing/techniques all you want, but tell you what, if you don't know how to hunt, you will never get any game.
We use "hunters" continually to push game towards us - they're nothing more than birddogs walking through the woods pushing game around & around.
BTW, these guys never see a single elk/deer ... all they do is move the game around so those of us who
do know how to hunt score everytime .....