I just use a stick as well, that is if I am not at a nice site with bear cables already in place... However, I have been contemplating using a dedicated rock bag and doing like what has already been said and storing the rope and the biner in it. I may just make my own out of a small piece of sil, but I have also been eyeballing the small cuben bags at ZPacks. I will probably get the large Blast (cuben fiber) Food bag as well...
0.05 oz 3"x4" Cuben Fiber bag @ $3.95
0.85 oz Rectangular shape 11" wide by 5.5" deep by 12" tall @ 20.95.
They also carry the tiny little biners too...
0.1 oz in blue or green @ $1.95 for a single or 6 for $10.95
Shipping is $3.95.
So, that is $30.80 for both bags and a biner and counting the 1 oz of rope that comes to a grand total of 2 oz for a bear bag set-up. Currently my food bag weighs a little more than that...