Friend of mine was there few weeks back and he said that it's just tourism all over the place. Even inside the "birth church" (or w/e the name is) is no silence at all. Everyone is talking loud, mobile phones ringing, cameras flashing...
He expected to find some quiet places there, maybe even find the chance to... you know... have a moment to think in such a "meaningful" place but he said there isn't any chance to get that: just one huge crowd everywhere. And he stayed there like 2 weeks and kept trying.
So, maybe don't expect too much... just repeating what I've been told.
Enjoy your trip tho.