My favorite black bear outfitter uses a 1/2 barrel with no top or bottom. It's basically a steel ring. He places a steel grate (similar to the material used on a food store cart) with a wood stick through it for support. An ordinary heavy rock is placed on the grate to prevent coyote, coons, etc from getting to the bait.
Fresh meat scraps are used for bait exclusively. Only a few pieces of bait are put in the can when baiting so the bears must continue to return if they want more fresh meat. Rain can just run out the bottom so water is never collected in the bait.
Bait cans can be checked from a distance because if the can isn't overturned then there is no reason to approach the can. An overturned can is always encouraging to the incoming hunter.
Another thing you can do is take used grease, get it from restaurants and poor it on trees so the wind can blow Tue scent around also take a coffe can and cut it in half and nail it along with a notted up sock hanging below it soaked in anise oil up. Kinda smells like black licorice. The can us used for a cover so the rain don't wash it away. Also put grease in front of hole of barrel so when bear steps in it he tracks it back of bait
I dont know who ever came up with the imaganary word of "Over Gunned"
I do the same thing with Hardee's and McD's grease. I place all the bait in barrel and then pour 3 to 5 gallons of grease on top of it. I have a series of small holes in bottom of barrel that let it seep out. When the bears come in, they step in the grease. When they leave, they make a scent trail for all other bears in the area to follow back to the bait.
it gets a lot of the bears in the area to your bait.