I'm one of those guys that has a very rural spot in the north suburbs of Chicago. My stand is about 40 yds from the busiest interstates in the state. Ive seen about 30 deer from my stand before and have never heard one before I saw one from my stand because it is so loud from interestate traffic. There is never a lull in noise either, I always have cars/trucks coming by.
I don't believe these deer can smell me either with the exhaust but I really cant tell. I've never seen one wind we before but really can't tell. I believe they are used to scent but I think they can tell when the scent is closer than normal. What I have learned is these deer know when something is up. If you are walking down the street, they could care less or in your yard, but if they see you in a spot they haven't seen people in too often they know something is up. I hunt in a half acre piece of woods on a acre and a half of land. They could care less if you are in the yard but once you hit the woods they know something is out of the ordinary.
All in all, they are still deer and tough to hunt and know something is up when your after them. I've been spotted in my stand many times and I am 20 feet in the air, I don't know why but suburb deer seem to like to look up more in my area. Don't know if its from low flying plans or what.
Having a spot 30 minutes to hunt from Downtown Chicago is a great convience but also sometimes tests my skills in ways urban deer don't. As long as I can legally hunt I'll take it anyway I can!