I was working as a flight simulator installation man, when the call came 
to pack for Korea. I squirrelled about a qhatret pount into the packing 
materials on the 'sim, and travelled clean.
Whe we got there (an found out that posession what like a firing-squad 
offense), we were almost too paranoid to enjoy ourselved.
One night, before the sime cleared sustoms, we got summoned at 10 PM, 
and told there was a "big problem".  We figured that the dogs had barked 
at the crates.  Nope, customs had found SMUGGLED TOOLS KITS in crates 
marked "simualtor parts".  We had to forge a letter, and bribe the 
customs goons to get our tools cleared.  But the dope got through just 
fine, thanks you.

Moral: always leave them something to find.