Golly, he sounds like a really factinating fellow.
"He wrote many scientific papers. His papers are readily available, but I can't find personal information"
Would seem he wrote at length about his life and family, too. According to "Perkins Genealogy" (1856), "He left a manuscript of 368 pages, containing an account of his life and experiences, which is preserved in the library of the American Antiquarian Society."
His wife's given name, Clarissa, is called out in the same 1856 passage ("Perkins Genealogy" NEHGR 10:213). She died in 1749 and he "wrote a poem on her death."