Matt O'Brien from Portland, OR, USA. Being so close to Dave and Mike, we may have to get together sometime. I just learned of this phenomenon and must say I am intrigued! I can't wait to search out my first cache, hopefully this weekend. Goat Mtn. should be a breeze as I've been up there many times so maybe it'll be first.
I tend to travel to the southwest a few times a year, so I plan on searching close to the places I visit if there is a stash nearby. I notice none posted (yet) in Texas or Arizona which are two places I visit often, so I may have to plant a few while I'm there.
I'm originally from northern VA, so I'll be heading for Jay's Quantico stash the next time I'm back there!