Whoever brought those kids, I guess. I can't imagine it, myself.
I don't want myself to find a dead body. When I was a kid, I read about "the boy in the box" and for years, was afraid I'd find a body.
There's probably not a lot you can control, with a volunteer search crew in a public area. At least there was a small contingent of LE, CSI - right? Those were probably the only resources Henderson would provide, so the rest was up to those who would provide.
When I saw the pictures of the same-day SP search, that one looked like a freakin' party in the desert (lawn chairs, dogs, drinks, paragliders, etc) compared to what you all were doing ... and those were supposedly professionals!