Whitetails do tend to stay within a 'range'. But they are wary and quick. I believe quail hunting is good training for whitetail in my part of the country. Now you see them, now you don't.
My only experience with mulies was when I hiked in the mountains of Washington state. They were lazier and slower than my cows. About had to kick them to get them to stand up then they just meandered off very slowly. Nice racks, but do not appear to be much of a challenge to hunt.