That is a scary thought, and if there were not sick people out there I would say impossible, but since there are sick people in the world, I can't say with certainty that something like that is out of the question. Think of serial killers, like the I-5 killer. He went up the coast right, California to Washington? A serial SO, targeting different camp sites, could be a possible MO for one. Think about this, a lot of SO target playgrounds because of the number of kids there. Well a lot of families take their kids camping, and they may not monitor them as closely, so it could very well be a place a SO would be drawn to.