If RT's story is truthful and BT was approx 1/4 mile from the RV, that would place her about here when he lost sight of her:
Google Maps which is just after a little bend in the trail.
IMO,
urgent need or not, unless there was someone else on the trail she wouldn't have walked or run anywhere. If it were me,
I'd simply step off one side of the trail. And, although I'm perfectly capable, I'm definitely
not going to scale boulders.
I don't know how extensive the search was in the area of the rock formations, just that members certified in cave searches and rope climbing were used. MOO