>>2697761If you are honestly and legitimately worried about back country camping and car issues there's very little besides basic stuff to worry about. You are not replacing a water pump or a u joint in the woods. Your first line of problem solving is don't have a problem. Make sure your car is good working order before you leave. If are concerned about contacting help, besides a phone just let someone know when you'll be back and when they should call someone to check. If very concerned this is a good if expensive case for an InReach or some other satellite comm device that you can use to send a prerecorded message "Car Trouble at trailhead" or whatever along with your coordinates. For the DIYer in you;
1. Know how to jump the car. Highly recommend in general people buy a portable jump. I have one well over powered for my car so I could jump basically anything and it was under 100 bucks. This is better than cables because you do not need another vehicle. It also acts as a colossal back up battery for the phone or other electronics.
2. Know how to put air in the tires and potentially take it out. A super basic 12v pump is under 20 bucks, a little more gets you a digital pump. And if you are somehow stuck in poor ground conditions you can improve your car's grip a bit by letting air out of the tires.
3. Know how to recover the car. Cars have recovery points front and rear. Most have some kind of big threaded eyelet that you put into the frame so that hooks and recover straps can be connected. This is useful to know so that if someone else has a vehicle handy they can potentially drag you out. But you can also self recover a lot of situations. A final thing you may want to have (and that I keep handy all winter at minimum) are traction pads. They are again not expensive (40 bucks for a good set) and they just provide a large, grippy surface area for your tires so you can get out of a mud hole or sand pit.