I highly recommend
this for a locking hitch pin. Make sure to order the one that is for your vehicle (Chevy/Ford/Dodge/Toyota.) Once in use, it is one less key for you to have to worry about (it keys to your existing vehicle key), and it does a good job, even when coated in road grime. I give the bearings on the lock the PTFE oil treatment come winter, and it works without issue, even in sub-freezing temperatures.
There are other trailer locks I've tried. Some are decent. Others I worry about since they can be easily picked. Still others tend to have bad Amazon reviews because they break and won't come off without the subtle persuasion of an angle grinder. I've also had some which had no protection for the lock cylinder, which got full of road dirt that it took some time to flush that out in order to operate the lock.
I do like the Lock and Load, which is a definite purchase for a generator like my Yamaha 3000 watt model. For peace of mind, I'd probably consider a security chain through the generator handles that would lock to the tow chain areas on the vehicle. That way, there are two different locking mechanisms in place that don't depend on each other.