Best outcomes I have seen are put stand as far away from bait as you can and still see to hunt it. I would like to be 200 yards away myself.
Use really sweet bait and not much of it (chocolate syrup, little debbie cakes, donuts). When the big bears keep coming back to the bait barrel and smell what was there but nothing remaining to eat, they start checking it earlier to the point it is daylight because they want their share.
In Alberta my guides always used beaver and I agree, the bears took that long before any sweets. They'd cut a small tree and hang it 15-17 feet across 2 standing trees, rope the beaver over the cross branch and hoist it up to where it hung 3-4 feet down. The bears had to climb the tree and walk across it to get the beaver. I watched 2 boars (maybe siblings) in the 350 pound range get a beaver and run off with it about 75 yards. I could hear them crunching the bones. They eat it in its entirety.
My guides always used a lot of bug spray from day one around the bait so when I doused myself with the same bug dope it didn't matter. No bugs on me and no scared bears. My largest BB is over 500 pounds. My smallest is about 200. I've killed them in NB, AB, BC.
Curiously, my guide in New Brunswick tried beaver and the bears did not touch it. They preferred a loaf of bread!