Two years ago I told two buddies to not trap and instead invest in some better guns and coyote hunting equipment. They each trapped for two winters, and spent a lot to do it, I think they got three coyotes total.
I took them out hunting under a full moon and we had three coyotes in one night. They sold their trapping crap.
For hole sets get a pound of sheeps wool. Then grab a little bit of wool and wrap your SMALL piece of bait in, it seems to help keep coons out. But coons will give you the most action and least headache. Make flat sets in a relatively open area near something that catches the eye. Like a single stick poking out of the ground, or a rock or clump of dirt then cover that little eye catcher full of coyote urine, be ready for deer to set off your traps doing this.
I tried trapping because I got to a slow start hunting coyotes but all the dang time I waisted checking traps and resetting them almost each day would have been much better spent learning to hunt better. I've got coyotes all over now because I hung up the traps and learned to use a hand call.
I don't mean to be a Debby Downer but it's advise I wish I had heard.