Heh they are my practice deer. If I were to be "stalking" up on them especially dressed as a tree they would probably bolt long before I got close. One must use ancient ninja stealth secrets. Stand very very still, when they look away take a step. lol
Not that camo doesn't work if your in good natural cover it can make you near invisible. However half the stands I see have all the limbs around them pruned, and stick out like a sore thumb.
So I think the rule here is an all or nothing approach. If your going to try to be invisible, scent, sight, and sound then everything needs to be just so. Otherwise you might as well be wearing solid orange coveralls with a cigarette in your hand.