Of course all day would be the best, but given the stated 4 hour window I would pick the morning. I've spent the last 4 days in the woods. Very disappointed with the number of deer I have encountered. The deer just seem to go nocturnal after the masses hit the woods on public land. It is so dry that any movement will be heard from a long ways by the deer in the area. Getting into remote areas of the 22k acres just pushes the deer into other areas. I'll stop whining now. I am blessed just to be able to be out in woods regardless of the outcome.