The calmer the better, with that being said they were on the move last night between the heavy periods of snow. The last set I pulled into they beat me to the field, 3 greys already out in the field....unfortunately I was right along a very heavily traveled hard road so shooting was not an option, tried seting up down the road to call them in but no luck. After the first 2 sets I was seriously questioning if it was too windy, but had to drive by set 3 on way home so figured I would swing by and to my surprise 3 sets of eyes in the field!