Get some Down!!! or Pirmaloft... wear it internally so that it doesnt make noise, Pirmaloft is super light and super warm and very packable, typically pirmaloft jacket you can bunch up into a ball about the size of your hand, not cheap though, but its warm and windproof and oh yeah it works! I think to many people get caught up in what the "hunting industry" says to wear. I wear alot of my back packing gear in the woods, along with wool and Berber and i am always wearing less layers and more warm then my friends who have to wear there 10 scent lok suits and there extreme warm whatevers from whomever that they cant even draw their bows wearing the stuff. I would focus on smart technologies and old school stand bys like wool and less on the other crap. Granted it might not be scent proof but nothing truely is scent proof.