Lessee.... first trip into the BW/Q.  Had novice family in tow.  Now I've done a fair amount of outdoors trips, but always on my own two feet backpacking.  Never canoeing, and I never needed to put food up in a tree to foil the bears.

So... doing as the outfitter advised, I found a suitable rock, tied it to the parachute cord, and promptly heaved it up into a fork in a tree.  Darned thing got stuck.  Y'know how p'cord stretches pretty good?  Well... you guessed it!  I pulled and pulled, and eventually the rock came loose.  And beaned me on the right temple as I tried to duck.  Had a good sized goose egg for a day and a half!

I use a barrel now ;)