Or even just install local software. Get a computer that lasts (have at least one non laptop). Have maybe some maps and Wikipedia locally.
Maybe walkie talkies too? Pretty simple to use!
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Fun fact: At least one ham radio store ran out of walkie talkies during the power outage in Spain, also there was plenty of chatter on 446 when it's normally quite quiet.
Maybe walkie talkies too? Pretty simple to use!