I’m a big fan of amateur radio, specifically portable operation, and Parks on the Air.
I’ll take my radio out to a remote location, throw an antenna up into some trees, and talk to people all over the US.
Currently I need mains power, but I’m looking to buy a battery soon, and I already have some solar panels gifted from a club member.
I live in Michigan, and last time I was out, my most distant contacts were in Dallas, Texas, around 1100 miles away, while I was sitting at a picnic table at my local state park campground.