Kits can be localized to your area. Kentucky folks will probably never need a small shovel like Michigan or Wisconsin folks might. Electric or duct tape is always good in a kit. A good spare tire, an extra windshield wiper, IF you know how to put it on. Same for that headlight. Buy a new battery if car is iffy. Or learn to turn off all electric accessories that can drain off your battery’s power. Over MANY years of driving, I have never needed a jump kit. A set of jumper cables and knowing how to use them, has let me help OTHERS needing starting help. A tow strap can be quite helpful, takes up minimum space. Do you have good tires? Problems can be avoided with good tires under you.
A couple small LED flashlights, some extra batteries for them. A space blanket, plus a real, fuzzy blanket for warmth. WARM Gloves, plus work gloves, extra sweatshirt. LED light with magnets to stick outside the car. Saves your car battery, works if car lights don’t. Great for if trailer lights fail you. Should be able to blink in the settings.
I carry energy bars in a plastic zip lock box. No smell to attract varmints. Water is always recommended, but it can freeze in very cold locations, might make a mess popping the top off. A safety, reflective vest in orange for winter, kept under the drivers seat. Put it ON when pulled off on the roadside and BEFORE getting out! Others can’t avoid you if they can’t see you!! The lime color does not contrast well in snow storms or against snow, for being visible. Though the reflective stripes work anytime a light shines on them! Available at farm stores like TSC or Family Farm.
Small tools, screwdrivers, both flat and plillips ends. Pliers, utility knife, wire cutters. A long length of binder twine or parachute cord.
I like the headlamp!
These things fit pretty well in an old small satchel