I ain't an expert, but I would shy away from 1-1/2 soft's for coyotes. As far as sets, learm to make a good dirthole and flat set with the traps well beded. I'm not good enough to explain how to make these sets, but I'm sure in a little while some folks smarter than me will be able to help you more. locations- same as most any other critter, look for edges, easy travel routes and food. I like field roads, crop edges. Good luck