When I lived in Arkansas, we were (my step dad measured it because he was anal retentive like that) 6.2 miles from the nearest town border. No street lights, no skyglow, just an acre and a half surrounded by trees, with nothing between you and the stars except the occasional cloud.
That's why Arkansas is on my short-list for possible places to move to.
EDIT : I can still remember the first time I saw a satellite in orbit, you could see it with your naked eye, watched it go all the way across the sky.