Probably a good idea to go see how much storage will be necessary...

https://slrpnk.net/post/28978076

I stumbled across this sort of fascinating area of doomsday prepping a few weeks back.

prepperpress.com/usb/

A nice addition to that, don’t just make it a USB, but a raspberry pi. So you’d have a reasonably low-powered computer you could easily take with you.

Not suggesting this one as it seems a bit expensive to me, but prepperdisk.com/…/prepper-disk-premium-over-512gb…

Build a Bug Out USB

A USB flash drive lets you carry mountains of survival information in a low cost, lightweight, compact device. Some preppers might criticize the idea because it requires an electronic device…

Prepper Press
at this point why not just use a phone running postmarketos?

Cause if ya wanna go overboard like I did, 1TB of NVME storage, can add with SD Card if necessary. 16GB RAM. Very little learning curve for my part as I use SBCs often. Plus almost every Docker container and program I want works on RPi without any hassle.

There’s also more robust guides and community for RPi.

Just my thoughts.