What I do in a situation like that is try to predict where they will run and try to position myself and take my shot accordingly. Still unpredictable but probably not as unpredictable as how far they will run. For example I have one farm that is all field on my side and all timber on the neighbor. Lots of deer but they ALL come from the neighbor. I position myself to shoot deer that are traveling away from the neighbor and I am between the deer in the neighbor when I take the shot. They all start circling back towards the neighbor but don't make it.