I would think a place deep in the woods would be pretty safe, I guess it depends. I live in the woods, my closest neighbor 1/4 mile+ away is a retired mailman, those types seem to know everybody, along with the people working the local country markets who are great for local news. Obvious by appearance there are quite a few current or former meth heads milling about, but break ins and grab and go thefts are very rare in my area. Maybe due to the obvious high gun ownership, masses of hunters are commonly seen and rarely does a day go by without hearing gunfire from target shooters.
That is where I come from as well. Unfortunately, we also had a high tweaker count in our population. And, just general dirt-bags.
Theft was a problem. Dirt-bikes, 4-wheelers had better been locked up tight! Break-ins weren't super common, homes or out-buildings.
But, if it was outside, un-chained? Or behind un-locked doors? Kiss it bye-bye eventually. Bar-parking-lots were the worst. There was a pretty big group of us that played in the mud.
Chains/straps, and spare tires were prime targets in bar parking-lots. You never really had to worry about your whole truck going missing, as everybody knew everybody.
Even pre-internet, it would be spotted in hours. But easy grab & go shit was constantly lost.
My personal strategy was a home-built tool-box in the bed you couldn't get in, in less than an hour if you had to. And, doors un-locked, windows down!
Leave nothing in the cab! I had a hat I would leave on the front seat up-side-down, with a pile of change and one dollar bill in. That money came up missing constantly!
I would find my empty glove box open, and even one door open and the dome-light on all the time. And, an empty hat.