I used to use deer dander. A couple years ago, I shot a buck and had a tough time finding it. beentown came to help with the search and every time he got downwind of me he would stop and say, "it's right around here somewhere, I can smell it."
I can't say it helped or hinderd, it does smell like a musky buck, but it might almost be too overpowering. i ran out of it and never replaced it. i smoke up instead.