Most camp attacks occur because the bears KNOW where the designated or heavily used camps are. I'm breaking rules, but I NEVER sleep in designated campgrounds in bear country. I justify this breach with zero impact camping. You can also assemble a poor man's perimeter wire by stringing light cordage with hanging tin cans.The noise will alert you and possibly spook Old Ephraim. Bear attacks are relatively rare. If you read the sensationalist accounts of those few, a few simple precautionary steps become obvious.