if people were looking right out into the woods for the sound i would say something odd is going on but everyone seems to be looking up so i would write it off as space junk or military fly by's of some sort.that mini space shuttle gizmo the AF is flying around could be it.
and Wendigo's don't make any noise,they just leap out at you with their long-long fingers..check out the pictographs left on the rocks by the guys who got away from them...and never say the name out loud--it attracts them...