I just look at the calendar to see when the full moon and the new moon are. The three days leading up to the full moon seem to be better fishing. I will look to see when the major feeding periods are supposed to be during this time just to maximize my time on the water, but if like Fish2win and BD said, if you are out there in the middle of the night and it is dead quiet, you might as well go on home. I love it out at night between midnight and dawn when the whipporwills and the owls are calling. You know you are going to catch something then. (Especially when the owls get really tuned up)