If you have doors/windows on only 2 sides Easiest to park the trailer against a 2 walls to block people from entering the trailer w/o moving it to clear the sides of a fence/wall/building...and if nothing is in it to begin with keep it unlocked with a "THANKS FOR SHOPPING YOUR FRIENDLY NEIGHBORHOOD" sign in it so he or she knows you are Watching...I still think claymoores or a big 12 guage w/ buckshot is better...hehehe I live and love TEXAS