I do my best to not smell like the cook tent or old spice deodorant. I use unscented soap, deodorant, laundry soap, etc in an attempt to not drop an unusual scent, but wind is the key.
I have literally walked within 15 yards up to a deer that was staring at me (I had an elk tag) with the wind blowing in my face. I have also seen deer and elk bolt when I was 750 yards away and I felt the wind on the back of my neck. If I approach on a stalk, I make sure the wind is my friend, or otherwise I hold back so I don't blow the game out of the area due to scent