A freind of mine did one of the controled hunts, DNR guys there said his deer was old , very old. After they did a autopsie and took its lower jaw and organs they let him have it, 5 hours later !!! They did not do this to everyone that got a deer, I guess they were just interested in his because as I said it was very old.
If you're lucky enough to be on private land and can leave your stand up during the off season you can tie an old piece of cloth or something of the sort to your stand. I like to use an old camo bandana that I have. That way the deer get used to the movement and eventually don't bother even looking up when there is slight movement. This may just give you the time to draw your bow or raise your gun without being detected.