Scent control is arguably one of the top challenges out in the field. It goes without saying that one needs to use every measure to minimize human scent on hunting gear.
Masking human odor can be nearly impossible despite these strident efforts, so adding a cover scent is one more tool to use for sneaking in to your stand unannounced.
Gordy Krahn shares his thoughts on the best practices for these, as well as using attractants once you reach your stand. You want every advantage out there to increase your chances for success.