If thieves want it bad enough they will get it.
A good friend of ours was on his way to Canada to hunt Caribou two years ago. Stopped at a restaurant for lunch. Came out and his pickup, trailer, and UTV. were all gone along with all their hunting gear and guns. The truck was recovered a year later when it was sold by the thieves and the new "owner" tried to register it. The authorities said it wasn't uncommon in that area of Canada for unscrupulous outfitters to steal UTVs and such and never come out of the backwoods hunting camps with them. Almost never recovered.