Free: Contests & Raffles.
What GMU? could be possible a few whities are running around.
Everything Bone has posted in this thread is spot on. I will add that I personally believe the day a muley rubs his velvet off is his sign that he's ready for the smell of estrus.
It was about 100 yards straight up the hill of this guy. I found three on this outing alone, along with many rubs.
Last time I hunted MT I watched a little 4x4 mule deer make a scrape' pee in it, then lay down in it. Get back up dig at it some more, pee in it again, then work a tree over for about 10 mins.