I have two spots, backyard and a place about 20 min by car thats basically the side of a quiet road with good unobstructed horizons.
My backyard view suffers fairly bad light polution to the north and west but worse than that its next to impossible to get any dark adaptation due to numerous street lights that I can't shield myself from so I'm considering making a set of these.
http://www.cloudynights.com/howtos2/shield.htm