RE: early seson calling
In my personal experience, calling in early season just isnt effective at all. In fact, i dont rely on calling deer anyime of the season. I have had success with rattling in the past, but where I hunt, the deer only respond to rattling a few days or so during the rut, other than that, it can sometimes cause negative results.
Concentrate solely on food and water. Try to find a well cut trail going from bed to feed, and hunt the wind.