hmmmm, well I have some old historic looking vellum. I could make a crude map with the right amount of tidbit clues, and then "leak" the story to the local papers how during Morgan's Raid near there, a large amount of jewelry, family silver, and other loot worth an estimated 1 million in todays dollars was stashed in "orchard pit" but the Confederates weren't able to return. I could causually mention my research had narrowed the area down to (insert topo dot) a remote trash filled depression.
Then you could just sit at home watching cable while people snuck in to dig for "treasure"
I'm not scared of the dark, it's the things IN the dark that make me nervous. :)