I started a thread a little while ago asking for
'Independent Historical Corroboration' for the Bible.
Most of the links/information that came out of that seemed to
suggest that while real places and major events have been
used in some parts, they do not entirely tally with the biblical
descriptions.
An example was the wandering of the Hebrews in the desert for 40 years,
which would have apparently taken then past numerous Egyptian garrisons.
Check out that thread ... there might be something useful there.