Can We Trust The Bible - Archeology?

I have an interest in archeology. Maybe i'm a geek but one of the most outstanding memories of my honeymoon was the visit to Cairo museum and personal tour with the (then) Egyptologist for the British and American embassies. One of the artifacts we got to see was a stone from ancient egypt, when translated we were told it means either "Drive the Hebrews out" or "Exterminate the Hebrews". Both of these fit the Biblical narrative of Exodus.

Since archeology interests me a portion of the Hermeneutical Spiral which talks about this was interesting. Below is a sort overview of what is discussed on page 160, but i'd encourage you to purchase the book.

1 Only a very small fraction of what was made or written has survived. . .
2 Only a fraction of available sites have been surveyed.
3 Of those surveyed only a fraction have been excavated.
4 Only a fraction of an excavated site is ever examined
5 Only a fraction of discovered material has been published

Edwin Yamauchi estimates that being supremely optimistic we could have one-tenth of the material in existence, six tenths of that surveyed, one fifth of that excavated, one-tenth of that examined, and one-half of that published.

Two things come out of this:

"Few archaeologists are willing to make categorical judgments on the basis of an absence of data." 

 (Meaning that just because nothing has been found (yet) doesn't mean it didn't happen.)

and

". . . the primary value of archeology is descriptive (providing background material) rather than polemical (apologetics)."