Easy enough to fool metal detectors if you pack them correctly, with several layers of pvc pipe as the canister
Searchers look down, never up most times. You vacuum seal then wrap in heavy plastic (contractor bag) cover in tree bark cammo and place them vertically against the bark of a pine way up; then go ahead and salt areas with nails.
RE: pack them correctly, with several layers of pvc pipe as the canister. ====
How exactly is this done? Wrap in a oil soaked rag, then perhaps garbage bag, the silicone seal the 4 or 6 inch PVC pipes that have end caps?