I used to geocache all the time, but I haven't done it in a while.
I always thought it would be fun to do some geocacheing at a hang out. People donate a few items of hammock related gear, someone would go out and hide them and then others would use the GPS to go out and find the prizes.
“Light thinks it travels faster than anything but it is wrong. No matter how fast light travels, it finds the darkness has always got there first, and is waiting for it."