Deer will get used to ATVs as long as you aren’t chasing or shooting at them from atv no matter the sound. I have a friend with a Silent Rider and the deer still hear it just fine. You can’t sneak up on them without the hearing you but you can get them used to the noise where they don’t associate it as a threat. Electric golf cart or bike would work better. We drive very close to deer all the time with tractors that are very noisy but the deer are used to it.
