While there is no proof and nothing to support it side from my belief that predators (and that is who I think is responsible) tend to operate in areas they are more familiar with and have some knowledge or comfort with.
I do think our perp knew of this spot and had at least passing familiarity of it. I think it much more unlikely that perp "happened" upon this spot whil driving around with two abducted children (alive or dead) in his vehicle and hoping to find an area which offered privacy.
Is there a store of some kind on the road to this place, close to the road
to this place ... you get my drift ... with a video taping machine ? Tapes
saved? Im betting LE is looking into this - even a priovate home with a
video taping of an entrance which might cover part of a road beyond ...