It is true that the secrets are passed down, usually from Father to son.
To that I will offer this. My Father, who has passed, long ago told me what I have used with great success for many years. I have now handed this down to my sons.
He told me that humans stand and move like no other creature in the woods. He told me to be as till as possible, move every part of your body as slowly as possible and be as quite as a church mouse.
When hunters do not follow these simple things I believe that most hunters never see the deer that see them first and just slide on out of the area unseen.
Thanks Dad!