Thanks! No fear -- as I said, one could hear cars coming from behind for a long time before they showed up. So I could be under the darkcloth without worries. Fairly quiet in the woods at that time of night (there was no wind as I remember). When I heard or saw a car, I just took note of where my front leg of the tripod was located, locked down the movements of the camera and the head, and on the legs of the tripod and could re-set up fairly easy.