There is no special art to putting dekes out. I just put a hen or two about 20 to 25 yards in front of me. I have had great success with dekes, but they are not going to work every time. As for leaving your dekes if you get up to go somewhere else, I agree with r33h. I wouldn't leave them. If I'm chasing a gobbler or trying to cut him off, I'll just leave my dekes hidden in the woods. I don't always take dekes with me on my hunt. A lot of it depends on the situation. They can be a great tool though.