How to keep thieves from stealing our 16' trailer?

Call or stop by some of the RV parks near you. Even though they may be officially closed for the season, the park owner may offer winter storage on his site for a very cheap rate (some near me charge only $30/mo). Your modest TT will not appear as juicy target as the FW's being stored in the same lot.

Fastway one step chocks secure the tandem tires and have a place to put a pad lock through them so they can't be removed without cutting the lock. That and a hitch lock would require two things to be cut which is a bigger deterrent than most make their campers to be. Putting a chain around the other set of tires or somewhere else on the camper would be cut 3. AT that point, you've got a very determined thief with obviously a low traffic area with no one around the area that is making them the least bit scared they will be caught.

I use the hitch lock in my driveway, even if I'm gone for a week but it's a relatively safe neighborhood with plenty of activity (school close, older neighbors that are home all day working in their yards and visible, etc. That and being fully insured and I just don't worry about it at that point.

If you have to leave it there, get one of those little 12V electric motorized trailer moving dollies. Then turn it around 180 degrees and put the hitch end up against something like a house, garage, tree or whatever so nobody can back up to it.
Then get one or two of those wheel immobilizer locks and secure the most visible wheel.
Then get a high end hitch/tongue lock. And for good measure, some stout high grade chain, around an axle to a tree or light pole. Or the hitch to some immovable object.
A motion sensor with some floodlights trained on the area will help too.

When a thief sees all that, they will move on to the next target.

Sometimes thieves destroy what they can't easily steal. Take reasonable steps like a coupler lock or parking a secured vehicle in front of it then insure for replacement value. Now enjoy your weekend and quit fretting about something that has a slim chance of happening, b&e is more likely than outright theft.

Take the wheels off of it and park another vehicle in front of it. If you don't have a vehicle you leave at home while gone, I'm sure one of the neighbors have one they'd like to park someplace else.

Granted my TT is parked in the fenced back yard and the snow prevents anyone from getting to it, the neighbor parks several of snowplow trucks in my large driveway when we're gone. It gets them out of his driveway and works for both of us.

Bill

Boot it!

Move to a better neighborhood?

Know anybody with some property that you can park it at for a small fee. Somebody with a acreage. Do you live in a secluded area I can't see it being stolen from a typical neighborhood.

Store it in a gated key code access both in and out storage facility with video security.

Depends upon where you park it and how accessible it is. Are you concerned about the entire camper disappearing? Or someone breaking in and ripping things off.

There are a couple things that will help detour a thief from taking the entire trailer. 1st is a hitch lock and second is a chain around the wheels. But a desperate thief can still have your camper out of there before you blink an eye, no matter how you try to secure it.

Items on the outside of the camper? like propane tanks, battery, tires? All you can do is put the battery inside the house or secure it so it's out-of-sight. Meth lab thieves will steal propane tanks. But here again, if you are really concerned, remove them and keep them out of sight.

One other thing you can do is buy an RV cover. It won't stop a thief, but if they can't see what under the cover, they might not take any interest in it either.

If you are worried about things getting stolen from the inside of the camper, just remove anything that has value to YOU. Even if that's your favorite tooth brush. Remove it and then you know it's in a better place.

A thief will get whatever they want. RV's are not very secure, no matter how much you try to secure them. All you can do is make your's less desirable than someone else's and make sure you have full coverage insurance on the camper. That's about the best you can do.

If you live in town, in a questionable neighborhood, then you might be better keeping it stored at a trusted friends house or a relative, even if that relative lives a considerable distance away.

In the end, all you can is keep your insurance paid up to date, and make your camper less desirable that one next one down the road. But if you have mischievous, ok... let's change that, if you have demon-destructive-juvenile-or-gang kids in your location, your camper probably won't stand a chance if you are gone, or even there. The best you can do is make sure you have vandalism and theft insurance paid up to date.