My reply won't be found under the old, stale, "Bear
Proofing" thread  :-/.

I have always hung my food and have never had a
problem (a good reason not to change). But... from this
year on I will (maybe) always pack my food in surplus,
airtight, aluminum 20 lb. naval powder kegs. Each keg
should hold about 20 lbs. of food and still float (a fetish
of mine). I painted four of them various shades of dark
green, so bears won't be able to see them (but maybe I
will). I will cleverly hide them away from camp and
securely cable them to trees.

Tune back in late August to see if this was a good idea,
or not (I am not sure if bears know about wing nuts  :)).

-aj