How about opening the site up for buses alone. Allot 5 bus permits a day. Have local guides on hand so that the artifacts of the site are protected and people get an updated account of what has been dug up. With only giving bus permits, there is not need to up grade parking or the road - which can be reconsidered down the line. Do Something now!
World Jewish Congress: Nazi train treasures must go to rightful owners (Reuters)
from the article: Ancient site near Nablus 'too problematic' to open