[pct-l] Mice

[Mike Yanasak]

Friends of mine hiking the Wonderland Trail a few years back sent themselves
a food package C/o one of the ranger stations in MRNP.  Upon retrieving it,
they found that mice had invaded the box (presumably) while it was stored in
the ranger's quarters.  I suppose it's a silly question, but has anyone else
experienced similar issues?  Any suggestions (line the box with tinfoil?)?
Mike