The big question: where is the little guy??
Do you guys have ANPR cameras on main roads/highways which would capture a vehicle on the move?
Speaking hypothetically, if someone close to him has caused him harm it was either planned or unplanned. To me, unplanned seems more likely. So someone would be in panic, disorganised, with a desperate problem to solve. Two options again, I think. Use a vehicle or stay v close to home. We had a dreadful case here (Tia Sharp) whose step grandad had put her in the loft. He was turfed out of the house during the investigation which meant he was unable to take any further steps, nature took its course and the little girl was found. The house had been previously searched by the police. My point is, I wonder what possibilities there are in the house and grounds and whether these have been searched, since the update was released on his status? (Edited - I mean in the police update, "endangered")
If a vehicle was used, that's why I'm asking about the ANPR cameras. I believe people often use sites they maybe knew from years gone by, but this would not apply if someone was relatively new to the area. So I guess it would somewhere they know from their recent activities. It's going to be secluded, with hiding places, somewhere you would not in this case want him to be found.
All JMO, interested to hear your thoughts guys. I have been careful to be hypothetical without implying any one particular person.