Never heard of a rig being stolen from a campground. Did have some friends who TT was stolen where they stored it at his place of business. Was behind a locked fence gate with a hitch lock (don't know what kind). The thieves towed it about 50 miles north and sold it at the next town where it was inhabited by druggies. It was completely tore up when the police found it about 4 weeks later.
We used to lock our 5ver kingpin religiously, but now only when we leave it unattended in a remote area.
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD 4dr short bed Duramax w/allison
Reese Fifth Airborne air ride king pin coupler with Sidewinder