Also Jeff, most of the smell comes from the tarsal gland after the buck pisses on its hocks (washing the scent onto the scrape). This accumulates in a scrape after muliple uses - and if you have enough scrapes in a small area you can smell the whole area downwind! I whitnessed it for the first time last season - I could smell the top part of a long skinny draw easily 100 yards down wind. I sat there once with a camera (tagged out)and saw 3 mature bucks in onemoring.It was insane.