If you do any backpacking or climbing, you are well on the way to creating a useful, versatile BOB that is light enough to be practical for a walking evacuation. The main difference would be the desirability of carrying medical and financial information in a BOB situation.

If you can use a vehicle, you can add additional items, like family pictures and memorabilia.

Firearms? Maybe, depending on the situation. I would be tempted to take my 22 survival piece, an Armalite AR-7. As much for the sentimental value as its potential utility, my S&W Mod 28, and perhaps the 7mm Nambu my father liberated, would make the grade if driving.