I don't worry about it too much. I hunt from a wall tent and go a week without a real shower. Sponge bath, wool base, and outer layers for me. I keep the clothing away from the cooking as much as possible, but it's far from foolproof. I'm still-hunting the big woods in the ADKs so I'm not in a treestand, but mostly headed into the wind where possible. When I used to bow hunt in from a stand I was attempting the scent-free (wash, rubbermaid tub, etc.) routine.