Oftentimes when a bull is heading to a wallow or waterhole, he will throw out a locator bugle to see if anybody is there. If he hears an answer coming from the destination spot, he most likely will head elsewhere to do his business. Before I knew this, I would answer back and think "oh boy, here he comes" and eventually figured out that I was essentially telling the incoming bull "this spot is taken, go elsewhere" and he would. I do agree that a bit of soft cow calling spaced well apart, may create some interest with perhaps those elk which are just out of sight but sparingly with your cow mews is the ticket here. I also think that splashing the water a bit at a wallow before climbing into the stand or moving into ground blind position can reap dividends. Just my early morning thoughts. Anyone else care to share a few thoughts on this topic?