Going outside is futile. The yotes can smell, hear and see you long before you can. Your only advantage is your superior human brain and technology, use it or lose to a lower form of life. Setup a blind inside your home near a window. Poke only the scope and barrel outside the window and cover the rest of the opening with a blanket and duct tape. Bait the target area with good smelly and tasty food aiming the HF alarm to the bait area. I have the sensor only 3' or so away from the main bait. Test the alarm using Titus to verify it is in range and working. I found that the alarm is finicky to setup. I bring the receive to the sensor, turn on the receiver and wait a few seconds. Then I try to trigger it with my body. If it doesn't work repeat until it does. After the receiver is synced up with the sensor, now move the receiver inside the home and have someone (Titus) trigger it again to see if the receiver is still in range. If not bait closer or move the receiver closer. You might have to put tape over the chime. Quite noisy if you have to have it close the the bait area. Once setup correctly you and Titus can watch some movies or listen to music until the alarm sounds, then it will be a simple matter of looking through your scope that is already setup and pointed to the bait area. You should get at least one. After that they may get wise and avoid the area. I don't know how smart coyotes are, coons are dumb and come back the next day.