I machine wash with baking soda or an unscented, UV dye free detergent. I dry in dryer. I do not use fabric softener at all so no scents in dryer.
Before I go out for the first time, I hang clothes, back pack, boots, etc, outside or at least lay them in yard for an hour. I typically dress and undress at hunting location and store hunting clothes in a trash bag or plastic tub before driving home. I cover hunting clothes with leaf litter and soil from my hunting location. Gives clothes an earthy smell that the deer are used to.
Wash clothes as needed for blood, or if have sweated profusely while wearing hunting clothes.