Unfortunately my eldest family member (dad's), my great grandfather, just passed two months ago...and my grandmother isn't the greatest person to get any sort of facts from...
However my mother's side seems more promising, as my great cousin seems to know more about our history as far as in Philadelphia...So I guess I can start there...Plus, like your dad, my mom began her's studying so I have some tree's written and then my other grandmother is pretty much the only one still in touch with most of the family, such as distant cousins and what-not.
At least you have a starting point. Good luck in your research!