A few tips. My great-grandfather was the bastard of the mayor of Avellino, his last name was Somma, but when he was adopted they added rio, so his last name was Sommario. I am focusing on my father's family from Sicily, so I do not know a lot of info on adoptions yet.
Definatly pay for ancestry and footnote, just for a month and see what you can find. You may find nothing or something, its worth the monthly price!
Also, I have ordered a ton of LDS films and have not found anything yet. It takes TIME, TIME, Time!!! Be patient and everyone of this forum is great and helpful. They should have a category just on tips