Once I was stumped trapping a culvert. What I ended up doing was getting two cornish hens from the store that expired. I wired them to the middle of the culvert on both sides and set a leg hold on each corner of the culvert. Usually ended up with at least 2 coon each night. Trust me it works, between coon hunting, fox and yote driving we take around 500 or more pelts in each year.

Now for Joker33 I would recommend snares if they are legal in your state. The are cheap and easy to make if you would like to do that.