This really chaps me. I'm sorry to hear you've been the victim of some scumbag(s) who feel it's ok to take from others rather than work for their own. One thing your misfortune does though is heightens my awareness. I'm going to beef up my coupler lock and I might even carry a big chain for the wheels.
I keep our TT at a good storage lot with high fences, on-site security, lights, cameras, and keypad entrance but what about when you're out camping and you decide to go off for the day? Dang... and I used to think I was going overboard when I would chain my motorcycle trailer to the steel tie-downs!
Mike, Sue, Sissy and Little Man
2015 Ford F350 Lariat FX4 6.7 CC DRW
2015 Eagle Premier 351RSTS