In all of those church videos I didn't see her react negatively towards anyone, and vice versa. I still don't think she went away with someone, but it could be my second theory, I've heard child murderers say that they just acted on impulse, they didn't go out to kidnap. If it did happen that way, I think it was someone who felt comfortable enough to just drive up. The kids could have been asleep by then, all of them could have been, except Summer who had slept a lot just recently. Personally I have ruled out stranger abduction and her wandering into the woods, but that's JMO.