I'll assume you untie the farmers, then.
All the farmers/farm hands are men, in their 20s or 30s, and all in pretty good shape.
"Ain't no women here." one says in reply. "And I ain't seen no men in red bandanas. It was just orcs what attacked us. Who are you?"
Another adds, "You ought to head to Braeholl. If these orcs invaded, there's probably a lot more of them. Someone needs to alert the soldiers. Call out a general alarm. This looks like an invasion. Look at these guys. They're an army."
Banion moves behind the house. By now, the sun is completely down. A crescent moon is visible, so he can see to some extent. He has two choices for approaching the shed on the hill. He can move around to the West, towards the barn side and approach through the field. The field has some tall crops still there, though once clear of the field, the hill presents no cover. The other option would be to move into the trees and go East around the house. He could then stay in the trees, with excellent cover, until he got to the NE of the hill. Either way, on the hill, there is no cover. From the east, he'd have to travel about 150 feet w/o cover. From the West, it would be more like 200 feet.