From my experience, yes the deer feed in the dark. But I have also found they love to wander (Assuming you don't have to much hunting preasure on them) between 7:00am - 9:00am getting in their last snack before bedding midday. I would just work the wind and slip in quietly as possible in the dark to your stand. The deer hear sounds in the dark all night long but don't necessarily spoke or run but just stand at the ready. If your slow and quiet and down wind, you shouldn'tspook them.
Eric S. Stacy AKA DeerDope