I have raised several deer that have had their mothers run over, and were brought to me.
Up until last year I had a buck that had been with me for three years. I don't fence them in, and they have complete run of the yard, and are free to leave at any time. Sam, was a little buck that could barely walk when I got him, and was the first buck I had been given. I watched him VERY carefully as he grew up, and some of the things I noticed about him were fairly interesting, and taught me quite a bit about how he was.
First thing I noticed, was his ability to pick ONLY the good acorns out of my hand. He would smell maybe 20 acorns in my hand and pick only 2 or 3 to eat, leaving the rest in my hand. After careful observation of the remaining acorns, they were either hollow or had worms or were water soaked. I thought it was pretty neat that he could tell them apart by just smelling them.(Of course, if you had a habit of losing your chewing gum in a chicken yard, you would probably get pretty good at picking it out pretty soon)
Another thing I noticed about Sam was his dis-interest at any kind of loud noises that I made around the house. He could be laying 100 yards from me, and I could bang a spoon on a hub-cap, and would barley get a response out of him. But if you flick your Bic lighter, he would jump up and immediatly put some distance between you.
My Wife made fun of me because every time I would catch him peeing I would try to get a pan under him and catch some, thinking it might be good for a cover scent.
As far as I could tell, it just made me smell like deer piss. I don't think it helped at all during a hunt.
Learned quite a bit off ole Sam, but he dissapeared a couple of years back. He had a 12 point rack last time I saw him and the wife and I figured he probably wouldn't make it through the next hunting season.
Probably just as well, he was getting to be a pretty big pest. He liked the Ice out of my wifes tea glass, and he was getting a little to big for her to be feeding it to him. I don't think he would have intentionally hurt anyone, but his horns were getting to be to big to be around.
Their sense of smell and hearing are so good that I don't think you will ever find a product that will totally block your oder from them. Best thing is to keep oder to a minimum and watch the wind.