We use to do it all the time about 1.5 hrs before sun up, it defintly narrows down where the will likely somewhat be when the sun comes up and you start calling, downside is mamy times they will come to top of hill or what not and see a truck or something g else that alerts them, then you go in and set up perfect and nothing comes in, I truly believe it hurts more than it helps when you do it from the road out of your vehicle, especially if others are also doing it, seems like they get onto it and have their guard up.
