In my car, I keep a large plastic coffee can, with plastic bags, a roll of toilet paper, a package of baby wipes, a bottle of purel (alcohol based gel hand sanitizer), and a small 4oz bottle of porti-potty deodorant. For a while I kept stuff in a 5 gallon spackel bucket, with plastic garbage bags, and a bungie cord for a SHTF porti-john. But it took up too much room in my trunk. And while all that may seem excessive, a couple of years ago, we had a significant snow storm that left hundreds of vehicles stranded on the New York State thruway for 27 hours.
Stuck in traffic on the side of the road, male or female can throw a blanket over his/her lap, and relieve him/herself while in the car if necessary.
In the winter I keep a 26oz bag of trail mix. That's about 3500 tasty calories.
Also I add a long handled shovel.
I almost always have a couple of bottles of water, maybe more.
I always have extra fleece blankets, and a couple fleece sweat-shirt type over-shirts, and some spare pairs of socks.
I also have a 100' length of 1/2 inch nylon line, and 3 or 4 inch pully. In a get out of town scenario, I might throw in another 100' length. I'd wish treeguy was with me, because I don't have a gas powered chain saw, and I like peanut butter
My winter/ 3 season coats have gortex linings, and I have a pair of gortex rain pants in the trunk. I also keep multiple cheap plastic ponchos and "survival" mylar blankets in my first aid kit. Plastic bags, over socks, but inside running shoes, can help to keep feet dry... wet feet are a bummer
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More during the Summer than Winter, I am guilty of letting my car run down to less than a 1/4 tank before filling her up, when running around town, but I top her off if going anywhere, and especially if there is an impending storm. I also have fuel for the generator that I can use for the car in a SHTF, get out of town scenario, if I need to. BTW, a gallon of fuel may have good trade value. Back in the '70's, during a fuel shortage and some rationing, I picked up a few hitch-hikers who had a gallon of gas and a sign... "Free Gas!"
If I was to bug-out, outside of my car, I would bring a power bank, a cigar lighter to USB adapter, and a pair of alligator clipped jumper wires, and USB charger wires for both apple, and micro usb phones, etc. I am sure that there will be many abandoned vehicles clogging the highways with fully charged batteries, that are either out of gas, or stuck between other cars that are out of gas. With the proper tools, I can charge my stuff, and anyone traveling with me. Again... there may be trade value in being able to charge other people's stuff.
If I planned to bug out by car, I would bring back packs, and a bicycle or two. Stuff tied to a bicycle can be a pretty efficient way to move stuff along a road, or dirt path. Ask the viet cong how they moved artillery pieces along the ho chi min trail.
And for protection I would bring Michonne :thumbsup: