if trailer sits often and only see's use in snow time
you can always jack it up, put on blocks
, take tires off
can always add some lug nut locks too, to prevent them from putting tires/wheels on and towing it?
but that might be over kill
as stated if they want it bad enough they will get it, best bet is have good insurance on it and NOT just home owners,a s many home owners policy's won't cover trailers and contents in it! and any trailer policy, make sure it covers all things
As said, devil is in the details, and ins company's I think know many folks DON"T read policies well or know what is or isn't covered at times!
and keep in mind there is different ways a INS company can insure a trailer, separate policy, or a policy attached to your vehicle, and DON"T just mean when its attached to your truck, I mean a policy written up with your truck AND trailer, as most basic vehicle policy's only cover a trailer IF its attached,
so you need to make sure its covered when parked too! and ask about contents of trailer too!
and it never hurts to keep pictures of things as loaded and as it sits to show things and conditions!
and up date pic's every yr too!