Bears are cannibal, so gummy bars will work.
Talking with a lot of guides, you should have a high % of good meat scraps in your bait regiment. From observations from my current outfitter, the sows seem to produce more cubs in the areas he has baited meat the most. Also, the re-occurance of bear on baits, and bear coming on inactive baits after using meat point to how effective it is. Bear are omnivores, but primarily carnivore.