I still feel a predator is possible in this case. I really don't feel that predators just stumble into something (such as being in that point in the Smoky Mountains at that time). Through trial and error, such individuals learn where they might find a child alone and prepare for such encounters in advance. It could be in a shopping mall, a schoolyard or a national park. Criminal activity - even that so heartbreaking as what the predator deals in - knows no boundries.