I always love your posts, and I usually agree with your thought patterns. This was a very thought-provoking post, and although I hadn't thought about it before, this caused me to think about the number of similar incidents I've heard of, and it turns out it was more than I realized.
I also stopped to examine exactly why I've felt the way I have, and I think what it is is that the main reason I've always felt that she was the victim of foul play is because I just feel like they would have found her body by now. I've always felt that she couldn't have gotten too far on her own, and even though it seems like the searches haven't been as thorough as they should have been, it still seems like someone would have found something by now. That's my only hangup with this theory.
However, of course it's possible that she did get a ride with someone to another location and then had some accident happen after being dropped off somewhere else, so I guess I shouldn't assume that she couldn't have made it far from the scene. For all we know, she got a lift or a series of different rides and made it 10 miles away and then was left to walk on her own and that's when something happened. That's a sad thought, because if that's the case, it's unlikely that she'll ever be found unless by chance, and who knows how long that will take. IMO, she'd have been most likely to be found had she had an accident in the immediate area, second most likely (although not very likely) to be found if she were the victim of foul play and they had evidence or a suspect in mind, and least likely to be found if she did have help getting away but had an accident in another location (since no one would know where to look), so I guess that's a pretty likely theory after all, considering they still haven't found her. The only hangup I have with that is that it seems like if anyone had innocently given her a ride and dropped her off somewhere, that person would have come forward by now with that information.