I know of many many times when we set up a drive from one road to another and there are people sitting inbetween these 2 roads. There were no vehicles on the road so we had no idea there was anyone in there.
This kind of stuff is going to happen no matter what anybody does. You just have to make the most of it when it happens, and be a curtious as possible when it does happen.
Good luck to all hunting and be safe out there.