I don't normally say what I do but what the hell. Two GPS trackers, one is activated the other is not. Steal it and block the signal, no problem. Wait awhile and then activate the "hidden" tracker.

I like the rods through the wheels thing. Good idea. I use a logging chain but I like your solution better.

Anything you can do to slow them down and make them go elsewhere. For inside the trailer go to www.burglarbomb.com but make sure you don't get zapped with your own trap.

Wired Mercury tilt switch....