I keep my bug-out bag in the trunk of my car at all times. It takes up about a third of the space. Even though I live in one of the lowest-risk areas in the US for natural disasters, there’s an outside chance of a nuclear disaster upwind. It’s better to be prepared than not. Also, I can easily decide on the spur of the moment to go camping and not have to run home to gear up. There are things in the list I didn't fit in the photo:
Sleeping bag (a cheap one from my childhood, but it still works for most weather)
Bike helmet--nearly as good as a safety helmet for earthquakes
Backpack containing all the rest
Mylar blankets--two, with one for use as ground cover
First aid supplies, including a few aspirin, Benadryl, and Imodium I replace twice a year
Water (more than shown!)
Water filtration device
Metal cup with handle (can serve as one-person saucepan)
Swiss Army Knife
Paracord (more than shown)
Magnesium fire-starter with whistle
Candles and matches
Survival fishing kit in film can: lead weights, hooks, safety pin, and coiled monofilament
Pad and pencil. Emergency phone numbers and addresses are written on the inside cover
Bandannas. (My readers will know my characters always have them! So do I.)
Brightly colored plastic bags--for trash and to help rescuers see me more easily.
Entertainments. When the SHTF, or any other time, I'm always up for a poker game
The items in bold/italic, I recommend. You can purchase them at Amazon, and I’ve included those links here.
As you can see, I didn’t run out and spend thousands of dollars on this gear. Some is old, some people gave me when I mentioned I was putting this together. The water filtration device, using technology developed in the Haiti earthquake, is new.