now that is a ideal.
http://gizmodo.com/5913745/backpack-rad ... r-campsite
Backpack Radar Kit Promises To Secure Your Campsite
The great outdoors can provide a relaxing reprieve from city life, but not if you spend all your time worrying about bears invading your camp. So even though it's designed for military use, this radar-in-a-backpack kit should provide ample peace of mind when roughing it.
The kit weighs less than 20 pounds when packed away, but when you've settled on a place to pop your tent, it can be setup in just three minutes. And once it's running, it will scan a 150 acre area for movement, reporting its finds to an included wireless tablet that shows the radar signal overlaid on map imagery so it's easier to pinpoint an intruder.