Seems like the 686 would be a decent fit in the Jeep. It’s enough gun to do anything you need in the woods. Worst case scenario you can take medium game at medium range for survival, and it would be adequate defensively for black bear, coyote, mountain lion, hog, etc.
The every day car the sensible choice is to double down on your daily carry. If 1 is good then 2 is much gooder. Mags, ammo, and spare parts should the situation ever get extremely dire. Primary thought being that you are going to be most familiar with it and the safe in the car would have space to store several extra loaded mags.