UDAP, the folks that make pepper spray for fending off bears, also offer (of all things) an electric fence as an alternative to hanging food in bear country. Powered by 4 D -cell and 4 AA batteries the fence packs a 7600 volt punch into a 9 pound package.
Looks like a viable alternative for groups that spend a lot of time in serious bear country. We hang our food when we are canoeing in Canada more to protect it from other animals than the black bears found in Algonquin (never spotted one myself).
Here’s a video of research conducted by the National Outdoor Leadership School (NOLS)
NOLS has used mesh electric fences for food storage since 2004, with over 100,000 fence-nights in bear habitat. This testing in 2002 was done to meet testing requirements that got the food storage fence approved by the Interagency Grizzly Bear Committee (IGBC).