Genesis 9:20
A vineyard that dated to when the site was active would not be proof but it would be a good indicator.
So far, no vineyard.
They’re only excavating the spot where the stone pillars have been found. Who knows what lies buried even a few hundred, or a few thousand, feet beyond that? If you’ve just emerged onto a new world where you and your family are the only survivors, you can pretty much put things wherever you want, and use as much land as you want. No need to pile everything within an acre or two.