Many years back, during 3-wheeler days, I'd slip into the woods way before sunrise. More than once I was watching deer when the sun brought a little light, and one of my late sleeper brothers could be heard a half mile away driving an ATV, and the deer would almost always fade into the brush. They knew.
But a year or two ago it was raining hard, and cold, so I took the noisy Kubota 900 diesel, with roof and windshield, to the stand, and parked it 20 steps away from my stand, though hidden in the brush. I had deer all over me that evening. They were upwind of me, so I guess that made the difference.
Was well hidden in the brush many years ago, and I had hidden my ATV, but not that well. Had a nice 8 point slip out from behind me, through a roadside ditch (road through our woods), and into the road. He looked left and didn't see me, looked right and saw the back end of my Honda and went 3 feet in the air, ran into the brush on the other side of the road and than peeked out to have another look at the ATV. And I shot him. He knew that ATV meant danger. He was right.
As for what ATV these days, I sold the reliable old Big Bear 400 Yamaha (17 years old) and went shopping. I bought a new Honda Rancher 400 2wd/4wd with the dual clutch transmission and independent rear suspension. Wow! Great machine.