Ok all your advice is good but has anyone killed anything with wrong wind
Yep, but there are a lot of reasons why. This year both bucks I shot were behind me, but both were focused on other things. During the rut is your best chance. I also practice scent control. I dress in the field wash my clothes in scent free soap. Shower with scent free soap before I go out. I also use deaddown wind products.
Scent control clothing and other garments
I like new base layers eat orders, X-sent and scent-lok make some. Also the suits, all these things help, but one thing I know works for sure is to shoot the deer before he smells you!!