Ok I am having doubts now after reading
@al66pine 's excellent post.
It's looking like
possibly RT himself was not out there in that desert, from the drop off at the dog kennel
until he called 911 at 3:26 pm.
Or the gas station stop where he was observed by an employee and the security cameras.
Did he/they hike out there
in that killing heat --from let's say they arrived there after the ice stop -- until he called about an hour after she 'vanished' ?
Driving in the truck he would have had A/C.
The facts show that nearly anyone would struggle to walk or hike in that area outdoors from the time they arrived until the 911 call.
So were they observed by someone , anywhere else ? ....