Benjamin Hopkins Born RI Died NY

Need the parents of BENJAMIN HOPKINS born 1775 in RI,possibly Washington County. He married about 1804 MARY REYNOLDS born 1785 or 86 in South Kingston, RI to Lieu. JAMES & RACHEL PECKHAM REYNOLDS. Their first five children were born in RI. About 1818 the family moved to Smyrna, NY. Here seven more children were born. BENJAMIN died 3-27-1839 the day after his youngest son, NOAH, age 11 died. They are buried in the same grave in Chenango County, NY.
The rest of the family moved to Kendall County, IL after his death.
I have info on down thru my ggggrandfather WILLIAM CLARK HOPKINS, his daughter, HARRIET HOPKINS HUBBARD, her son, CHARLES HUBBARD, his daughter, FAYE HUBBARD FREDRICKSON and my mother, ARLENE FREDRICKSON NEUHAUS.
Besides wanting the names of BENJAMIN'S ancestors, I would like to find the gravesite of BENJAMIN and his son.