Every fall I toss a bag of clothes into back of the truck that includes a heavy blaze orange parka and bibs, a couple of full face knit caps, heavy gloves and mittens, a camp stove with some minimal provisions (granola bars, tea, broth cubes) etc. along with that goes a shovel, battery operated strobe light, extra flares, and a few other things. This is in addition to the stuff that normally rides in the bin.
There is no app for common sense.