During the early bow season, which ran from Oct 1st until Nov 6th in my piece of Ontario I spent a good number of days in the stand (14 according to my journal). There was a healthy population of does (and of course I only have a buck tag) so I took the opportunity to try and dispel some of the very myth's that have been "handed down" particularly to deer hunters.
Some days it was windy and we all know deer "bed down" when it's windy, right? Well at anything up to and including 25 kms they were still very active - didn't stop them from coming in to munch on feed corn and apples.
And yes, as this thread has indicated so far, the "wind direction" had no discernible influence as to what direction they came in from. I get "predominately" westerly winds and it was about a 50/50 toss up as to whether they would come from the east (so wind in their face) compared to from the north or west.
Next, since they (the does) would often come in and "chow down" for 45 minutes to an hour at a time - and NOT just at last light - they would wander in three to four "hours" before sunset, I decided to see "how much noise I could make" without 1) alerting them and 2) scaring them off. Since this (for me) is "bow range" they ranged from between 6 and 17 yards from my stand (base of the stand is 10 feet off the ground).
I tried all the "typical" sounds that may come from a hunter - zipped/unzipped zippers - nothing - didn't even perk their ears. Opened a thermos and rattled both the cup top and the stopper - nothing. Rubbed the arm of my coat on the bark of the tree causing that (bristling) sound - they stopped eating, their ears started doing that swivel - stood still and listened for a good 20 or 30 seconds and then settled back down. A couple times my hunting buddy called on the walkie - that also "alerted" them, but didn't spook them off. I also dropped various items on the floor of my stand, stomped the floor a couple times, tried knocking - couldn't get them to leave.
Two sounds that sent them packing - discharging a spray can of scent - so that "hissing" sound - saw tails up and off they went - also another "hissing" noise sent them packing - was frigging around with the walkie and it blasted out some static - nothing but "white tails" going in every direction at high speed.
Even had one evening where I had two deer in feeding - one directly in front of me (15 yards) and one immediately to the right of me at 12 yards - both totally relaxed, both eating. A raccoon wandered in and started eating beside the one in front of me - only having about 10 minutes of shooting light left I promptly "popped" the raccoon with my crossbow (legal with my small game licence) - anyhow, the doe adjacent to it decided to "go elsewhere" but not at super high speed and the one to my left, again 12 yards from where "I fired the crossbow" didn't even look up from what she was eating.
A couple other things that didn't spook the deer was gunshots. During the early bow duck/goose is open. On at least half a dozen days that I was there guys were popping off dozens of rounds with their shotguns within 300-400 yards from where I am set up - shotgun shots don't even warrant a "look up" - likewise, in the week before the gun guys were "sighting in" about 800 yards south of me - and again, the shots resulted in "no response".
The one that really got their interest was a chainsaw - a tree had blown over our access road and a couple of guys went at it for about an hour one afternoon. The blowdown was about 150 yards from my set-up. The deer stopped and looked in the direction of the noise - they stood perfectly still staring in the direction for fully 20 minutes. Then they advanced about 50 yards towards the noise and simply "laid down" facing the direction of the noise. They stayed bedded until 15 or 20 minutes after the noise stopped and then came back to feed.
And the last myth I dispelled (at least to my satisfaction). Every time they were in I lit up a smoke and blew in their direction - with the wind coming "predominantly" from behind me, it was going in their direction - zip, nothing, nada - not a look, not a sniff, nothing.
Now all this was "pre-gun hunt" - I will continue trying these (tests) if they bother to show up in the late bow, which opens tomorrow. They may be more "skittish" since they have been enduring gun hunters running around the woods for the past couple weeks...