I'm glad this topic came back up; I am genuinely interested in the responses. Much has been debated about entry/exit to hunting areas and leaving latent scent. Countless times, I've had deer watch me (not even rising from their beds) as I drove by on the tractor. Of course out at the farm the vast majority of the time they see me on a tractor or ATV is a non-hunting season and I'm working and not paying them any attention...they're used to it. Running cameras during the summer I pull right up to them on the tractor or ATV, do my thing, and am out of there in minutes. Then again, it's during the summer and deer seem to be way more tolerant of human activity (especially on a working farm).
I recall as my grandaddy aged and couldn't get around so well, he built a box-blind on the back of the tractor and would just pull right up where he wanted to hunt, climb into the box, and hunt. He killed countless deer in his last few years to include some straight-up bruisers. Looking back on it I wonder if he was unknowingly overcoming the scent issue. No boot or latent scent, a "cover scent" of diesel, and a "blind" that the deer were accustomed to regardless of where it popped up. They never even paid it any attention...might as well have been a round bale to'em.
I have actually wondered if it is LESS impactful to take an ATV into a stand area rather than walk (especially for long walks in). To this day I still hoof it but have definitely thought about a whether another approach makes more sense.