I think I can help you. Your Dad was my Father's first cousin. Our grandfathers were brothers. Your grandfather was my Great Uncle John (Giovanni) and the relatives in NC you spoke of are your Dad's sisters. There names are Rosalie (deceased) and Mary. I don't know Mary's married name but probably could find out. I also don't know if Mary is still alive but Rosalie died some time back.
My dad's name was Carmelo also. They were both named after their Grandfather Carmelo. Do you know what year your father died? If I remember correctly it was late 70's early 80's. He died shortly before mine, who passed in 1985. He also was married to his wife Katie who passed long ago and had two son's from this marraige. Unfortunately they too have passed There names were John James and
Michael. I also live in the Buffalo area. I hope this helps and if you have any questions let me know and I'll try to help.
Good luck, Jim LaMacchia