It is a HUGE area.
Also the Greeks have significant experience with this stuff.
(in fact if you are ever in Athens, the subway station at Syndagma Square has a wall that is a side slice of the items found at that station’s site)
Everything is moved and catalogued. Then now use computer mapping on the more significant sites.
Also in Macedonia (Greece not the fake FYROM) there are burial mounds in the region which have yet to be explored.
it is all rather remarkable.