“the logistics of him moving to and from the FOB.”
Probably the same method Bowie Bergdhal took - he simply walked off.
“In the early-morning hours of June 30th, according to soldiers in the unit, Bowe approached his team leader not long after he got off guard duty and asked his superior a simple question: If I were to leave the base, would it cause problems if I took my sensitive equipment? Yes, his team leader responded – if you took your rifle and night-vision goggles, that would cause problems. Bowe returned to his barracks, a roughly built bunker of plywood and sandbags. He gathered up water, a knife, his digital camera and his diary. Then he slipped off the outpost.”
http://www.rollingstone.com/politics/news/americas-last-prisoner-of-war-20120607
That story doesn’t even come close to what was put out as the official story for what happened with Bales.
But, like I said, I wasn’t there, and I don’t know what happened. Neither do you. You feel free to speculate wildly, but there’s a LOT of explaining left to do.