I have yet to have to really worry about pigs, but I would probably put it in my sock on the bottom of my foot depending on how much I had, I don't think they'd say "take off your socks" that or inside my boxers.
For my stash in my room then awhile ago I made a little rip in the bottom of my bed, not ruining my bed but the crap thats like under it, I don't know what it is. Anyway I just slide my stuff in there.