I have RZRTracker gps hardwired in the machine, and a TRAK 4 gps in the truck.
Then i have a 25' 1/2" chain that i wrap around the front suspension, around the front of the open trailer, and around the rear axle of myExcursion.
Then security cable from steering wheel, to side of open trailer, secured with a big ass New York U lock.
Then security cable locking the trailer ramp up with another New York U lock .
Then a wheel lock on the trailer.
Then, motion lights with 125 db sirens strategically placed where they shouldn't go off unless you're up close and personal to my rig.
If nothing else, the shear amount of locks and chains and cables and wheel locks should deter any crackhead thieves.