When we go LTB fishing, we get 4 20l buckets, and fill them with a mix of oats, yeast powder, beer, Dog Pellets, Chicken livers, Chopped up cow liver and heart and fill with water.
Seal the buckets and leave outside for 2 days, before use. Remenber to release the gas build up every now and again, or you going to end up chumming your back yard!!
I dont like letting it stand for to long and get to rancid, personal belive is that Catfish would eat fresh meat rather than rotten.
Once on the boat we puncher hole's in the lid, and lower them down, two on each side of the boat, this allows it to slowly seep out and release attractant as long as you there.
And then obviously fish the same hoock bait as whats in the barrels.