Here is what I have used for a year.
This is the same look as mine, but I bought a different make.
It fits over the extra large lip on the hitch for the Safari, since others don't.
LifeLong Locks - The Strongest, Most Theft-Proof Trailer Locks You Can Buy
for the receiver and coupler lock.
Keyed alike, and they even had one for my 1.5" hitch receiver.
Smooth and easy to use.
For the LP gas tank lock and battery locks, I got some thread locks from
I also put a long wire rope lock around a wheel.
To foil those campground power stealers, I got a surgeguard hard wired to
the AC wiring inside, so it doesn't show.
And to foil those pesky stinger thieves, the latest Airstream Life had an excellent idea for an add-on to hold the receiver. I will put a hole in it
to put the lock in. Here's a picture of the article.
But the biggest improvement to my Air security was to get
indoor, locked storage in a locked storage yard.
But one can't live in fear, so I got insurance too...