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saltrunner, thieves don't unzip or unbutton anything, it takes too long. I have a full button cover and the thieves used razor knives on the canvas.

Why not, doesn't the pocket device alarm too?

How about something like this?

http://www.sportsmansguide.com/net/cb/2-pk-of-us-patrol-2-in-1-motion-sensor-alarm-chimes.aspx?a=789154

I have a battery powered motion sensor pointed at my boat along side my house. The alarm head plugs in at my nightstand by my bed. When I'm camping, I just lean more on my insurance policy.