Betadine; The Ultimate Scent Killer
Being a bowhunting I've always been fanatical about scent control. Whether it's sprays, carbon clothing etc. I've tried it. The best thing that I have found for eliminating human scent is Betadine. It's been used in hospitals and homes for decades as a defense against infections on minor scrapes and burns. It can typically be found near the pharmacy in any of the major "one stop shop" stores, and a bottle will last multiple hunting seasons.
Before every hunt possible I will shower and scrub every inch of my body with a liberal amount of betadine on a washcloth. What this accomplishes is to kill the odor producing bacteria that lives on your skin. With the bacteria eliminated you can sweat profusely without any body odor (could come in handy on a first date too!). Being that it is an iodine based solution it does have an odor of it's own, so I always follow up the betadine scrub with a scent free soap.
Hope this helps you get a little bit closer to your quarry this fall.