They married by License, check if it still survives, it may give more clues.
He did name a son Benjamin.
From FreeReg children
Ann bap 23 July 1757 poss. burial 24 July 1757
Frances bap 7 October 1759
Benjamin bap 10 January 1762 burial 30 May 1768 age 6
Sarah bap 17 March 1765
John bap 1 march 1778
There is also a burial of Benjamin Bissell 31 May 1761 no age given could be another son born between Sarah and Benjamin who died soon after birth.
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Could this be a brother of Samuel-
Benjamin Bissell buried 20 July 1771 age 33 so birth circa 1737/38
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Another question could they have moved somewhere nearby between Sarah 1765 and John 1778
It's quite a long gap.