Typically I would agree that the less noise you make getting in the better, but I also have an older neighbor who drives one of the loudest Gators I've ever heard right up to his stand and the deer are moving normally again within 15-30 minutes. Hell, I've driven past a couple deer feeding with it 30 minutes before dawn and they didn't go anywhere.
Around here, atv use is the only option in most of our hunting spots other than your feet - and even then walking isn't even a safe option half the time. Some of us park them 100 yards away, some of the less nimble guys leave them 20 yards away from their stands. As long as you get in early, I wouldn't worry too much about the atv noise. But everyone's different. I would just rather get in quick, early and safe on an atv and give it half an hour to quiet down than hike it and get to the stand an hour later saturated with sweat.