RV security is really two problems wearing one name. A trailer spends most of its life parked, and most of what goes wrong happens while nobody is looking. This section covers both halves: stopping somebody taking it, and finding out when something has gone wrong inside it.
Who this is for. Anybody who leaves a travel trailer in a storage lot, a driveway or a yard for weeks at a time. Read in the order below. Locks come first, because they are the only part of RV security that prevents anything rather than reporting it.
Start here
The RV storage and security guide explains what actually happens to a parked trailer and how the pieces fit together, from theft through damp and rodents. Start there before buying any single product.
Locking it
Every RV security decision starts with the coupler and the wheels, because a trailer that cannot be towed away is the whole game. Wheel and coupler locks covers what the ratings actually mean and why no US standard exists for any of them.
After that it is the specific points somebody works on. Hitch and receiver locks covers the difference between a hitch lock and a coupler lock, which is the real question. Trailer door locks covers the published key codes that make factory locks worth replacing. Battery locks covers the part taken most often and the cheapest to protect.
Knowing something happened
If a trailer does move, the question is whether anything tells you. GPS trackers covers what actually reports from a metal box in a lot with no power. Security cameras for unattended RVs covers the same problem for cameras, which mostly assume a house with mains power and home wifi.
Watching the inside
Theft is not the only thing that ruins a stored trailer. Temperature sensors and water leak detectors cover what can be monitored, and both are honest that a sensor in a lot with no network reaches nobody. Freeze alarms answers the narrower question of what an alarm is for once a trailer is properly winterized.
Then the seasonal jobs
Protecting a parked trailer from weather and pests is the other half of the same problem, and it lives in storage and winterizing: keeping mice out, choosing a cover, controlling damp with no power, and keeping the battery alive.