It just depends. I've been out and got skunked if I go at dusk. Most of the time I have a good bite at night is when I go around 2-3 am and fish until around 10. The summertime bite can be good, but once the sun comes up, they'll tend to start moving deeper. The spawn has been like this for the last couple of years now. Seems to be easier to catch them from 3 am till around 9 am. I usually fish brush along a bank that drops off at a steady pace.