I'm not familiar with 16A specifically, but generally speaking if it is cold they may more likely be on eastern and southern facing slopes as the sun rises in the morning. But to be honest, the older (bigger) bucks are often out in the flatter terrain where spot and stalk style hunting doesn't work well, which is how they manage to live longer I guess. Some guys sit water holes all day out in the flats, which can be effective if you have that kind of patience. I don't. But again, the older bucks often water nocturnally. The one saving grace is that January is the rut.