Ok, I'm going to get a roll of toilet paper for mine. guess should get a mini folding shovel for the toilet. Already got couple of takedowns, ammo and mags in them. They are the extendable ones that will fit the m4's too.
Cash, compass, knife, machete, multi tool, wind up radio, guess should put an old jacket or sweater in too.
Other stuff in there, mini can opener, mri's, rope, mess kit, water filtration bottle, lighters, first aid kit, if the time came, would pack flash light.
Good idea about having one on you in the car. Thinking about taking up hiking to get a feel for the loads.
Would probably hunker down in the house where all the food, guns, ammo, and comfort is, unless the situation demanded high tailing it.
Ok, and I'll pack adobo sauce too.