As has been noted in this and other case threads, more than a few times a body has been recovered from an area previously searched, and searched numerous times by different entities. "Gee, how'd we miss that?!"
It appears the 'rock formation' was searched, as there are photographs showing searchers on the slope and top of the formation. Did those searchers climb the formation to peruse every possible crevice and pocket or did they climb the formation only to get long-distance views of the broader area? I hope their purpose included both.
If they have not done so already, it's time to get cadaver dogs on the formation; searchers may have to carry the dogs up the rocks, as it seems nearly impossible for a dog's stride to safely accommodate the distances between sloped, smoother boulders.
Before certain avenues may be effectively pursued, others must be eliminated from the list. Either BT is in that desert rock formation or within the limited (within 5-15 minutes walking distance) broader desert area or, she isn't.
LE must be positive the search teams performed flawlessly and be adamant BT is not in the limited desert area. When that is true and, given the extremely low probability of an abductor just happening along Kelbaker or Hidden Hill the exact moment BT was approaching their RV... there are only two possibilities left: BT disappeared on her own accord or the other possibility, which we are not permitted to comment.
This has gone on long enough. I believe LE is stumped at this point. They have no direction which to pursue. Short of a discovery, a confession or a someone giving up what they know, this case will reach temperatures typically experienced only in Antarctica, and that makes me sad.