As the mating urge starts to grip them, bucks begin spending most of their nighttime hours looking for does at feeding areas. Generally, deer head back into cover shortly after first light. But does rarely head straight to their bedding areas. Instead, they sift back through cover slowly, stopping frequently to browse. It may be two to three hours after sunrise before they actually bed down. During this interval bucks can be very active, moving constantly between doe groups or becoming glued to one hot doe. It's been my experience that mornings are the best time to take a big buck during this phase of the rut, precisely because of this prolonged activity period.