Nice topic timing! I'm looking at a few micro-caches in a West Coast location I visit a couple of times per year.

The driver is the recent change that charges for checked luggage. I'm not paying $25 each way to include a sharp or two for a 4-day trip. Piracy!

So, I'll mail (to a friend) the stuff I can't carry-on to a commercial flight any more -- a well-used SAK, a battered old Leatherman, an inexpensive but serviceable folder, a small wood saw blade, a hacksaw blade, one of those diamond sharpeners with a taper and pointy end, and other items that clearly threaten the very existence of civilization as we know it (where's the "face palm" emoticon when I need it most?).

Most stuff will stay with my friend; but a couple of sharps will be buried in flower beds or tomato patches close to where we usually stay.

So, looking for bright ideas on discreet and secure storage.