Yes, everything about this seems to suggest that this wasn't just some random paedo. Emotively, that is the conclusion everyone seems to jump to when a child goes missing. But compared to other alternatives, a random abduction is actually a very rare occurrence. Particularly from right under the nose of the parents. Sure, Daniel Morecombe and the Beaumont children were randomly abducted by abhorrent child rapist murderers (Daniel Morecombe proven, Beaumont children highly suspected), but again, entirely different circumstances. It was opportunistic when these children were out and about, away from the watchful eye of parents.Yes, whatever the motive, it is someone who knows the parents, and knows their movements, where they go camping etc.
More often than not, crimes against children are by people known to the family.