http://www.backpackinglight.com/cgi-bin/backpackinglight/bear_bag_hanging_technique.html

The PCT hang is fool-proof, even in areas with problem bears. To be honest, I don't use anything but a standard hang in the Appalachians. The only place you have problems are in well-used (and abused) campsites, usually near roads, where the bears are used to a steady supply of free food from dumb people.

Many of those spots have been identified as problem areas and supplied with steel bear bag cables, poles or lockers to keep your food safe.

There was a lighter version of bear cannister made just for black bears. Now that I check their webpage (bearvault.com), it's rated for grizzles, too. I have one sitting in my gear closet, but I've never used it because it's: a) overkill, and b) ten times heavier than a nylon bag and 50' of cord.