I have been tinkering with a cyberdeck for a while now for off-grid usage, so this is a nice find for the hardware side. My main battle lately has been building out the software side; primarily Kiwix (https://www.kiwix.org).
So now instead of just Kiwix; I also have my handheld radio programming software (CHIRP), ATAK Server, microcontroller dev environment, copy of Collapse OS, etc.
I have had a similar project set bouncing around in my head. I have some LilyGo LoRa radios arriving soon to see how well Meshtastic works as an alternative to internet.