coyotebuster,
The two body parts that move the most on a calling stand are your head and your hands,
I feel they are the most critical to cover.
Do a test have a friend that is completely camo covered, including his hands and head sit in a stand like situation now walk out away from him 100 yards turn around and look at him. Now have your friend take off his gloves and head cover.
have him turn his head as if he were looking the terrain over for a possible incoming coyote. Now have him move his hands from his lap to the ground as if he is adjusting the volume on his caller. Remember a coyote will be able to see what you see and a lot better than you can.