From my son's and my experience, we always seemed to go in too soon. If you shot at 10:00, I'd give him till 3:00 and follow the trail. That'll give you 3 hours of light to find him. Others may wait longer. I just don't like tracking at night, cause with all the leaves down, and it seems every other leaf has that red blotch on it which isn't blood, it's just a harder track. Besides, 5 hours is a pretty good wait. Good luck on getting him.