Heber,

I for one do sort of believe in the urine thing, I learned it from an alsakan guides manual when I was a kid. But you need to go out 100 yards and you don't need a complete circle - it was stated as thing to do in grizzly country. There are obvious trails in and out of any area. Marking a tree on each approach to my camp seems to keep my camps bear free, even in the Sierra. However if you are in a national park all bets are off.

Jim