MRBB, you make some good points. I'll add to it that my bow was way out of tune this season, which I'm certain didn't help! (I just got it tuned with a new string.) That said, I think those critters are certainly catching on, as I've never seen them so skittish before! This year, no matter where I set up my stand, they seemed to have some kind of sense about not providing a shot... whether it be location, time of day, which path to take, etc.
But at least I have one more weekend to hunt! (Before my wonderful wife cashes in that coupon I gave her for Christmas that says I have to shave the beard... the small print made it clear the coupon was not good during hunting season!)
Good luck you guys!