I normally wash my hunting clothes in the washing machine, simply using plain water (warm) no soap
. Then, I take them in my back yard and hang them up to air dry for 2-3 days, depending on the weather. It does not seem to matter, if lightly rained on and then dried again. This simple process is all I've done for perhaps 5 yrs now for all my hunting clothes. I do use scent-away spray before entering the woods normally too. A couple other simple things that help are switching hats once on stand (ever took a whiff of that favorite hat??)
And putting outer layers on only after arriving at my stand site so as not to sweat too much walking in.