It's a treasure hunt and THE ENTIRE WORLD is invited!
"Watch out for snakes!"
This is a fun activity, and it's amazing how near these hidden sites can be to you.
So you look up the coordinates, and you take your trusty gps, or map and compass if you're a masochist, and then you find the treasure, make an entry in the log book and then put in something and take something out and then you go off and have a bbq and do some birdwatching. Perfect!