Would stacking work for that photo at all? Wouldn't the features on the ground be blurred if you align the stars?
I could believe it's just ISO 1600 and 30 seconds, as the EXIF says?
And you don't need to travel to Chile, just be away from the light pollution and be prepared to make the photos during the moonless night. Use the shooting timer and then you can even have a video of the stars moving, the Milky Way is always impressive:
Excellent photo, though. I'd love to visit a site with such dark skies and good seeing.