There is very little on the internet about Campolattaro.
You could check with the local church and the city government while you are there . These may prove difficult and time consuming.
OR, contact "My Italian Family"
www.myitalianfamily.com they will research it for you (for a fee) and you can have a great deal of information before you go to Italy and make your visit to Campolattaro even more interesting and valuable. While you're there you could then take the time to visit all the sites and maybe the cemetery (looking for family names), etc.
I have used "My Italian Family" and was pleased with their research services.
Hope this helps some.
Have a great trip to Italy.
Todd