First I'm not a good coyote hunter, not even decent, so I probably shouldn't be giving advice. So I will give you a scenario.
Picture this, you set your call 300 yards away. At night. First can you see that far at night with your light? If you can see, can you identify your target well? Better then that, you have your call 300 yards away upwind from you I think most people can agree coyotes don't always get right on top of the call say they decide to not come in closer then 100 yards. So now you have a 400 yard shot. Another question is, have you ever tried to scan an area as vast as that? You can't just scan to the call and think "Oh well I can see to the call must not be any coyotes around" yeah... the situation sounds like a disaster and sure as [beeep] doesn't sound like you'd have any success at all.
Edit: Why does using fawn distress have any effect on where you put your call??