Bark as camo on this magnetic keyholder mini cache. Directions to a larger cache could be hidden in it. Total loss elsewhere, but you crew could still have unknown access to a secondary cache. No paperwork or digital files at home to be found.
This image from Nasa's Spitzer Space Telescope shows a stellar nursery containing thousand of young stars & developing protostars near the sword of the constellation Orion. I heart the Spitzer space telescope.