You know we live in sad times when a guys gotta seriously think of covering his trailer in sewage decals, covering it with fake poo, and knowing that won't stop these trash of the trash.. Theives fully deserve a special place in hell.
Best thing to do is put game trail cameras everywhere.... that's what I do. Takes nice pictures of the lic plate of vehicles driving by my stuff I need to keep an eye on. Just got to remember to clear the pictures on the card at least once a month. Plus it's nice to know what random vehicles are driving by my stuff, I save those pictures so I can keep record of activity of suspiciousness