We found this item about the AT (Appalachian Trail) in North Georgia being closed to camping due to bear activity.  Day hikes are still permitted.  Read it, and you will see that the reason for the closure is that hikers have not been diligent in storing their food correctly and in cleaning up after themselves.  We have often written about the need to keep your home free of attractants, but the same is true when you are out hiking or enjoying other outdoor activities in bear country.