Add some USB dead drops here and there like little geocaches. Maybe add some offline Wikipedia backups and other Zim files with a kiwix server. You could manage text, a file server, some web pages, possibly voip and maybe video calls. Sounds like a good time. What’s it called, meshtastic? I have some vague experience / knowledge but never set it up.

Depending on terrain and population density you might be able to cover a large area. I’ve seen small scale implementations for highly urban areas using Bluetooth.