I'm with Rdfx flat sets and scat sets. Try using the "T" bone vertabre from cattle carcasses...pound the long spine into the ground. Or char a stake top (6 to 10 inches or so) pound it in so only the char is showing and apply your gland lure or urine. (the char ,black, gives you a visual). Angle the stake towards your trap to direct the coyotes approach; you could also make this a sublte walk through but be careful when forcing a coyote. When I do use gland and urine I like to separate them by oh maybe 10 to 12 inches with the trap between them making a triangle. I set in alot of sand but its mostly in washes and the banks make a natural backing.