I use camo's when shooting. its always good to blend in with the enviroment , i dont clean my clothes unless i really have to and then i hand wash them in hot water.
things to consider when your laying up waiting for pigeons , rabits or any kind of shoot:-
Shape - take the shape off you using leaves and look more natural
Shine- dont wear watches, glasses or anything that the sun will reflect off
Silloette- dont lie on the row of hills or anywhere that the moon can shaddow you, or you shaddow the moon.
Shaddow- keep still and keep in the shade if you can. shaddows create movement aswell