Anything that stinks, and has honey, or some form of sugar in it will attract the bears. Best baits for any species are ones they are more likely to find in their area, or foods they like to eat. That is why Honey works so well for black bear. Fish for Grizzly and Brown Bear. Both eat tons of fresh green grass, but that usually is gone by hunting season( unless you have a Spring Season) Its the sugar in the new shoots that the Bear's smell and crave. Berries are always a treat. If you can't put out bait with bones, then bone the meat out. It is really not that difficult or time consuming, considering how long the baits stay out on the stands.
Take the time to watch bears eat. Many years ago, I learned a valuable lesson from an old cat, who loved to eat Peas, but only cooked frozen peas- not those out of a can(YECK!) as long as they had salt, pepper and butter on them. She also loved Tuna. I once set out a plate of tuna, and a plate next to it of left over peas, seasoned and buttered, and watched her check them both out. She ate all the peas FIRST, and then without a hiccup, moved over and ate all the tuna!
I am not suggesting that Bears are as discriminating in their eating habits as my cat was, but she reminded me that you best learn how to attract an animal by watching it feed, first. Bears are true Omnivores, Like Humans, so they will eat most anything. What you want in addition to the food value, is something that will have a strong odor enough to be carried on the winds, so you can attract bears to the site from a longer distance. Next, you want to place your bait near known bear trails, so they don't have to exert much, if any, energy coming to the site. ( The Law of Conservation of Energy.)