Vehicle security for long road trip

apple air tag? if someone want the car they are going to get it. thats just the way it is.. you need to prevent the theft of opportunity. kill switch, the club anything that makes it harder to get for a regular guy who stumbles on it. being able to track it if stolen is the key.
I would put a fuse under the dash that appears to be for the radio, but is actually for the ignition. Under the seat would work also. What you want is to be able to quickly and without being obvious, replace the good fuse with a blown one. Thieves want to be in and out with the goods quickly and quietly. If the ignition is dead they likely won't waste time. Install an alarm that will arm when the door or hood are opened.
Park with the wheels turned as if to make a right turn and install a "Club". This way if they try to drag it up on a tilt deck, it does not go straight which makes it more difficult.
I think some alarm companies have tracking features.
As was stated, the serious thieves will make off with about anything. Being incognito is one way not to attract attention, but Plum Crazy is not in the "incognito" catagory, so slowing them down with deterance is what is desired. Make the bastards look for another target.
A young fellow in Saskatchewan was not exactly the sharpest knife in the drawer. He had a loud stereo and played it loud right up to parking in front of the house. Of course that attracted unwanted attention, and one night the stereo was stollen. Insurance asked if he had an alarm. Nope. So insurance said they would pay but he better install an alarm, which he did. A month or so later the stereo was stollen again, with the alarm. Insurance covered it again but said that was the last time. His response was to wrap fish hooks in the wiring loom. Came out one morning and a punk was sitting there with his hands under the dash, impaled on the fish hooks in both hands.
Smarter would be to turn the stereo down a few blocks from home.