Hi, I don't know this family but i did take a look at your tree to see if I could help. the best evidence you had was your father's baptism record. It says that Robert Gilbert Trudelle was born 20 September 1943 in Dighton Ma.
I found a Robert Gilbert Trudelle in the Massachusetts birth index b 1943 in Dighton Ma.
Next i looked for A Raymond Trudelle . He could not have been in the 1930 census because his parent's would not have been old enough.
I found a Raymond R Trudelle in the Massachusetts birth index. Born in fall river in 1947. To know for sure this is the right Raymond you should order a birth certificate from the town clerk of fall River.
I found the Birth record for your grandfather Leo H Trudel b 13 September 1916 in fall River.
I found the birth record for your grandmother Marie Rita Parent b 7 May 1917 in Somerset Ma.
Massachusetts marriage index shows Leo & Maria were married 1938 in fall River