I've had the same problem in the past. Tried trapping first. Had fair success for awhile. Starting out live trapping and relocating them. They got wise to that so I had to switch to leg hold traps. Caught quite a few that way...then they started avoiding anything that didn't look to be part of the feeder.
Finally decided to put together a sort of purpose built 'Coon Sniping' rifle... and THAT seems to resonate with them! The report of the rifle and one less of their comrades...does not go unnoticed.
After dropping the first couple of Corn Bandits...the rest of group were still visiting the feeder...BUT were obviously 'nervous'.
The next couple taken out...resulted in the remaining Coons moving their 'raiding' time into the wee hours of the morning. No problem, I can be there, this is WAR!
The last one I shot had them all leaving like their heads had caught fire and their a$$es were 'catching'. Been over two weeks now and they haven't returned.
Either they decided to 'move on', or they are preparing a counter-attack.