I just don't think it's worth the effort or cost.
About 15 years ago, Cornbush and I set up on a steep hillside that lead to a saddle that deer and elk were using to cross between two valleys with heavy hunting pressure in the bottom of each. The wind was swirling all over the place, when it was blowing at all.
After about an hour passed, I looked over to see Cornbush tucked in behind a few trees, reclined against a large boulder, rifle across his lap, asleep, with a freshly-lit cigarette in his hand. And, just as I was going to get up to wake him before he burned his fingers (and move on to another spot, anyway), I spotted some elk meandering through the dark bottom below us.
We had deer tags, but deer will start moving if they're within 30-50 yards of elk. So, I stayed put and kept my eyes peeled.
Those elk went straight up the game trail that Cornbush was sitting on, and most of the herd (lead bull, satellites, cows, calves, and all) walked right past him (within inches of his left foot) without seeming to even notice the human or smoldering cigarette. Finally, a large cow, almost at the end of the line, stopped. She sniffed and sniffed his boot, inched a little closer, sniffed at the rifle, inched a little closer, and sniffed at the hand with a cigarette now burning into the filter. With her nose about 12 inches from Cornbush's face, she sniffed and gave a little snort.
Cornbush picked his head up.
The elk took 2 steps back.
Both of them had a "deer in the headlights" look.
And, without even a hint of being spooked, the cow just set back on its way up and over the hill at a casual pace....
Scent might matter in some areas. But, where I hunt, even most of the archery hunters don't worry about it.