Well, How about leaving them (the clothes) in the backyard. They will take on the smell of the outdoors. Another thing that I have heard of, but never tried, is to use materials from your hunting area (acorns, leaves, pine needles etc..) to make a cover scents. It would seem the pine needles would work the best (off the trees not the brown on thr ground ones!)
Eliminating your human scent
I don't know. The "Scent-Away" seems to work for me.
I did a small experement where I took a sweaty doo-rag and had my wife smell it before and after. Very obvious difference. It may not go away completely, but it does reduce it.
Another note on that. I was told that in order for all of the smell to go away you must get your clothes damp with it, and they must dry completely.