I wouldn't try to scout by walking in on the main access road into the Vail Tree Farm, but you could scout some of the nearby areas, which are still in the same GMU. Right now is a good time, before the trees get all leafed out. It's easier to see the lay of the land and easier to find deer trails. The best time to go out if you want to see animals, especially bucks, is July and August. But the best time to scout is anytime you can!