Homesteadonomics demonstrates making a trailer hitch/coupler lock. It is a pretty basic design: 4″ steel tubing, two lock hasps and puck locks, a 2″ hitch ball, and a hinge.
While it might be a bit overkill, he thinks it will give him a bit more peace of mind on camping trips when he decides to leave the trailer for day outings. Maybe it can do the same for you…
Shop Puck Locks and Hasps: https://amzn.to/2XsO0ct
