...and on the Pi
I have a small project idea, to bring along a Raspberry Pi the next time I go camping, and set up a network for other campers on the campgrounds to connect. It would be totally anonymous, campers would still be able to disconnect from traditional technologies, but they would be able to communicate with each other, perhaps with cool code names too, because I'm a dork.
This could be a useful tool (if you forgot to bring along a flashlight or if someone in your group has experienced some sort of injury), or it could just be a fun way to see if fellow campers are down to drink some beers.