I work for an outfitter and we took 69 bear off of baits in a two bear area last year in effort to improve elk population. Here's a few observations:

No bear were taken the week of the full moon, yet 40 lbs of bait was completely ate each night in six different baits that I stocked every morning....not a single bear came in during daylight.
If the bait hasn't been hit, build a small fire, throw on green pine boughs, and poor on used cookingoil to make a very smoky fire. Should send sent that the bear will follow back. Do this with all new bait stations to get them started.
Set baits on ridge tops in cover so the bear are comfortable moving in during daylight and sent travels numerous directions with natural air current.
Used cookingoil that most restraunts are happy to get rid of should be added to any bait you happen to use. Once any bear has hit the bait they get theoil on themselves and leave a sent trail that the other bears will pick up and follow back.
Use smaller baits and restock often, a couple days empty and the bear generally will move on. Overfeed, they often gorge and won't return as often.
Bulk malassas is cheap when bought from a livestock feed store....make a lot of sent and the bear really go for it.
Baits work best before the hillsides green up...bears move on and feed on the new vegetation.
Use a cover sent of some sort, I set up a bottle of used cookingoil with about a tablespoon of liquid smoke, put a pin hole in it to make a slow drip.
Feel free to correct my spelling