Free: Contests & Raffles.
If your trap is on the ground I hope you have it covered!!! If your only after cats and coons get it up off the ground, even a foot and a half is plenty to keep the skunks out. When you do catch your feral cats, dispose of them quietly, you might find out the hard way they were feral after all. It's a pain you do not want to experience. Good luck!
It would be cool....unless your trap is un-covered....I only speak from extensive first hand knowledge. You become part of bomb disposal.