Not to backcomb this point, but if other sites are to be believed, this wasn't just a comb.
Not sure if it was sentimental to her, but it may have been a big deal at the time. Much like getting ears pierced was a rite of passage to some, a brand like
Mason Pearson would've been tres. Esp in the hair, lots of hair, 70s. But there doesn't seem to be any mention of the comb or jewelry besides the mention itself.
All to say, with different dogs hits, and the totality of this happening on the way back to the bus (where she'd be lost heading down as opposed to wandering up or fanning out), I think Trenny went to the road. If she went with someone she may have been encouraged, but certainly not dragged. From the road to wherever she is now is anyone's guess. It seems the facts have gotten interwoven with other internet discussions on her fate. I'm not convinced the reason she left is the reason she hasn't come back. Meanwhile, a brother's comment to watch her, and potential for the bus being followed wave giant red flags, but only if true, and only in a focused context.
I SAH would like to know how often a crying girl, walking on that road, regardless of being (now known) close to an MP scent trail, who is also not accounted for happens..., at Clingman's Dome of all places, on what is probably not an opening-attraction-at-Disney-World-busy-type of afternoon at 3pm. ETA: ...also not located happens....,AND makes enough of an impression to be noted in writing on an otherwise redacted report. Double ETA: How often does that scenario happen ANYWHERE? I'm trying to think of the last time I saw anyone, but let's go with a teenage girl specifically, walking down the road crying. I can make a valid argument against it happening and it not being Trenny, but statistically, for that day, at that point on the Earth, within that timeframe there are a lot of bells going off.