I think a deers' reaction to odors, sights and sounds, depends on what they are acclimated to. I've seen city deer you could hand feed, but they looked both ways twice, when crossing a road. I witnessed deer in Va. use drainage ditches, to actually get past standers on deer drives, where the deer low crawled half the length of a bean field in the drainage ditch, then stood up and ran the rest of the length of the field, undetected by the stander. The guide placed standers at the same locations most every weekend, then went to the opposite end of the drive and turned the dogs loose.
Our party here, would always post standers before getting drivers in position, because we learned that deer would often be seen while the standers were getting to their stands, and the deer heard the drivers organizing, and bailed out, sometimes miles away, and we almost always drive into the wind.
There was a pine plantation we used to drive that was about a half mile wide by 1.5 miles long, with four small hills on the south end, the pines at the time were about 5-6' tall. We usual put a stander on two of the hilltops, and a single stander on the west side. The east side was a swale swamp the deer didn't cross, and the driver on that side could cover easily if one ever did. We had from 5-8 drivers most often on weekends. The standers on the hilltops could often see deer moving around the drivers approach, using the pines to their advantage, and the drivers never saw the deer, and the deer never came out of the drive. Most of the time it would just be my Dad and I, so I would post my Dad and maybe one of my brothers on one of the hilltops, and then I would be the only driver. I would walk odd patterns inside the pines, like 100 yards one direction then turn and go a hundred in another direction, then maybe zig zag a short forty. Really freaked the deer out, and they would then bail out to the south, towards my Dad or brother. The deer couldn't see me, most often couldn't smell me, but they could always hear me.
I know of several loggers, that during deer season, just turn their equipment off and wait for the deer to show up shortly. Show me a skidder or slasher that isn't leaking hydraulic fluid, and they sure aren't quiet!
Can't tell you how many deer I've walked up on, using the wind in my favor, and jumped out in the middle of fresh logging slashes. Probably my favorite way to hunt by myself, just slinking along, stopping often, and just looking through my scope. Lever gun heaven!