Leave the food, kill the coons more will come.
At any rate, catch em in a live trap. Carry trap to yard and shoot them in the head with the 22 while they`re still in cage.
I live in the middle of the woods and between dog and I we probably kill 20-30 coons a summer when the gardens growing. I set four live traps baited with something sweet(they can`t resist donuts) every night.
P.S. To keep donut bait cost down, be-friend a cop and get his leftovers