Apparently they were. Info from a guy that's into this stuff -- "Got home so can check Veit and Peterson now. Paraphrasing from them: Loggerheads were a breeding resident, but a rare one, in the Berkshires and Valley through the early 20th century. The state's last several breeding records were nearly all in Essex County in 1956-7, plus one last brood fledged in 1971. Reports of migrants went from up to 10 per year in the 1960s, to just 1-2 per year from 1975 until their book's publication in 1993." And apparently just a handful this century.
And the local pro
It's all been very interesting, and fun. Met a few folks I wouldn't have otherwise. And while birders are certainly weird, I think they would come in quite far behind orienteers in that regard. :-)