A friend of mine kept his stash about nine feet from an active Geocache. He had the unfortunate luck to run into a ranger while checking on and resupplying his stash. The ranger helpfully told him that he was close, but not at the geocache, and gave detailed instructions on how to find the cache. He thanked the ranger, had a picture taken with the log, and left the area without incident.
He later moved his stash to another location, just for safety's sake. I've actually used a similar method in storing items that I only used for certain events with little difficulty or problem.
Theres some work to this but the idea sounds like a viable alternative to gun confication. If I did that I’d have to pass the location on, FOR A PRICE!