i think it is worth it and will work to some extent.
Is it going to stop someone from doing a B+E or stealing your trailer? not a chance, unless they were a complete moron... if they were serious about it, they will have likely been watching the place for a while, not just randomly walk by and say "hey i want that"
It is likely to deter some kids from stealing your lawnchairs or whatever else you have left out though. and god forbid you left a cooler of beer outdoors, save the beer! LOL
and like mentioned a few times, the convenience for yourself is a big bonus. If you venture out and return late you dont have to leave a light on.
'14 XLR 395AMP
'16 Ram 3500 DRW, 6.7 cummins w/aisin trans and 4.10 gears