I had actually added that but forgot to save the last copy. One round pen option is next to the barn and the other requires going through the arena. (Picture gates and fencing where they need to be.) Driveway could have a loop for trailer parking and entrance to the ring for dragging.
ETA: If you don’t mind hiking to the arena, my preference would be using the second paddock down from the north or across the driveway in the upper left corner of the south field. Both look to be cleared and I’d rather have horses near the barn than the ring. I’d rather have the round pen close to the barn, though.