Like Brother Knawbone, I LIKE hunting areas with swirly wind!!!!!
That being said... I've been at this Deer Huntin' game, for 40 years. Gun & Bow, From Central NY farmland, The woods of the Hudson River Valley, The Catskill Mountains, The Adirondacks, plus the mountains & cedar swamps of Maine. Tree stands, ground stands, still hunting, even getting on a "Big Buck" track and follow them up!!! The ONLY thing that is a "sure thing"... Deer, will ALWAYS smell you, no matter how hard you try to cover it up,or prevent it!!!
The BIG factor is, How do the deer react to it... Deer are animals,and every animal is differant! Some are just plain skittish, Some are curious, and some just seem to not give a $hi+!!! I've killed deer with the wind blowing right at them & I've had them spook when the wind was right in my face. Years ago, Gun hunting with family in the Catskill Mts. My Dad was sitting on the mountainside,looking down the mountain. Behind him, was a flat "bench" that was out of his sight. On that bench, no more than 50-60 yards away, was one of the biggest bucks I had ever seen on that mountain... Bedded down,with a big doe. The wind & morning thermals, were carrying my Dad's scent, right to them. They had not a care in the world!!! They knew where he was,and could hear him if he decided to come up over the bench,and be gone before he'd ever see them..... I watched the buck & doe for almost 2 hours. I even watched the big boy,lay his head down & take a nap! I couldn't shoot,because my Dad was in the line of fire,so I decided to try and sneak down and get them to move... Perhaps one of us could get a shot??? I SLOWLY, picked my way down to them on an angle... Suddenly, They both jumped up & lit out straight along the bench, STILL out of sight of my Dad!!!!! He never saw them.
Bottom line is, Deer are gonna smell you, LONG before you see them. Wind in your face is good, Wind on the back of your neck is BAD!!! If the wind is in your face,you have a pretty good chance of not being winded. If the wind is at your back, rest assured the deer will know you are,"Over there"... A swirling wind, which seems to be the most predominate wind during the season, tells them "Hmmm, somethings around". They do not know EXACTLY where you are, or even if you are still there!!! They are kinda "on guard" but certainly NOT "spooked"!!!!! This is where they rely on their sight & hearing senses. They get a wiff of something,but cannot tell EXACTLY WHERE it is. Or, even if it is still there!!! Like Turkeys that have AMAZING vision... If a Turkey spooked every time something in the woods moved... He'd be a total basket case,and dead from starvation in no time. Because he'd NEVER EAT!!!!! Deer are the same way... If a deer spooked & left the area, every time they smelled something, they'd be dead from exhuastion... Because they would never rest or eat!!!!! This is why I believe that cover scents and lures, sometimes work so well. They help to confuse them & kick in a deer's natural curiousity.....
A swirling wind,can be your best friend!!!!! Just HUNT!!!!! You can't kill deer on the couch...