Friends that I know here that did a genealogy of their family started at the Morman Library. (You do not need to be Morman).
It seems the Mormans (sorry if that is not correct)are very meticulous record keepers, for various reasons, they follow everyone from Ellis Island on...as explained by my LDS friends.
Co-workers of mine went to the library in Mesa and found the women at the library were so very helpful and they got loads of information in a relatively short period of time over a few visits.
So, maybe try that?