If you've got cash burning a hole in your pocket, get the Moultrie system that texts/emails the pictures back. By the time they lift your camera, you have their mug in a photo....

But if you can't track them down you're out $400. I did see a thread on another site where someone used this effectively to bust some trespassers. It got them to his cell so quick he was able to call the sheriff who caught them still on the land.