Just get a cheap appliance, or a big flat screen tv box, full of cardboard. and a GPS tracker that sends it coordinates to your phone.
Want the booby trap route, make some spring loaded devices to push on a spray can, when the string is pulled. The spray can can be paint, a nasty smelling stuff like battery terminal spray, bug repellent, or what ever you can think up.
A walk through the hunting department, may come up with some other ideas, like making a device to dump the contents of deer urine.