I can't find caravan driver in quest "The lost caravan". I think I searched anywhere aroung Burwich road. Can anybody help?

There are at least 2 positions that I know of, unfortunately I am not at my PC so I can't check, but they are both at a camp of those snake guys. There driver is locked up in a cage so you might have missed him because of that. It is also not that far from the site where the caravan was ambushed. I hope that helps a bit.

Look at the blue circles on the attached image (don't mind the red one!).