Coons will wise up in a hurry. Mine learned how to trigger the door, then reach in and grab the food. I kept seeing empty traps with no food left, phantom coons.
So, I staked the trap with rebar to the ground to keep them from rocking the cage and triggering door.
I covered the back 1/3 of cage with 1/2" hardware cloth to prevent them reach into cage for food.
These modifications worked, so far.