When I hunted bear in Canada the outfiter used old pastries. It worked well. As mentioned before I have heard of using dog food and burning some honey to get a scent into the air to attract the bears. I've seen outfitters on tv using beaver carcasses to bring the bear in. They hang them high to make the bears work to get them and offer a shot.
I'd go to a grocery store to see what they do with their old pastries. I think pastries would be my choice of bait. Probably some more ideas out there, but I know the sweets will bring them in.