Let's say a modern forensics team could use a time machine to examine the tent, footprints, fire-pit, den and bodies before they were found. Do you think a definitive conclusion would be reached, or are we still left with a mystery and competing theories?
And yes, if you could use a time machine, then saving the hikers lives would come before solving the mystery. But just as a hypothetical, is this case something that could have been solved if it occurred in 2018, by just examining the scene of their deaths?
Certain theories could be confirmed or ruled out, but stuff like infrasound and ball lightning couldn't be without recording equipment during the incident. I don't know about a staged scene.