It's just their natural cycle for most bucks to go nocturnal at that time of year regardless of pressure. Obviously pressure will send them there quicker. If you keep observing your cameras in a low impact way, you will see that 3am buck creep closer and closer to daybreak the closer you get to November. Then all of sudden there he is looking at your camera at 9am. Every buck is different but that is a trend (not the rule) that I have noticed since I started using cameras.