Origin, Rise, and Progress of Mormonism which is on Dale's site @ http://solomonspalding.com/docs1/1867TucA.htm and I came to the section which I've quoted below from p18.
Mr. Tucker mentions the Smith family were atheists. I don't know much about the entire Smith family, but I've also thought that J. Smith must have been an atheist, possibly a deist. He certainly didn't seem to believe in an interfering God. The reason I think this is because he didn't seem to fear a God for his behavior of extramarital sex. It's obvious he had a penchant for extra marital sex given the Fanny affair and what better way to continue than under the ruse that it is something God wants him to do much to his despair. Polmeroy Tucker, a contemporary of Smith who lived in the same town and observed Smith and family thought the family were atheists. As Tucker pointed out, and what is commonly said, Smith did believe all sects were false. But if we take that further it is likely Smith also believed the Bible was false. Tucker points out that Smith thought the Bible was a fable. by the way...I like atheists. I'm not so sure about atheists who speak on behalf of a God though.
(P 18. Polmeroy Tucker's book: Protracted revival meetings were customary in some of the churches, and Smith frequented those of different denominations, sometimes professing to participate in their devotional exercises. At one time he joined the probationary class of the Methodist church in Palmyra, and made some active demonstrations of engagedness, though his assumed convictions were insufficiently grounded or abiding to carry him along to the saving point of conversion, and he soon withdrew from the class. the final conclusion announced by him was, that all sectarianism was fallacious, all the churches on a false foundation, and the Bible a fable.
In unbelief, theory and practice, the Smith family, all as one, so far as they held any definable position upon the subject of religion -- basing this conclusion upon all the early avowals and other evidences remembered, as well as upon the subsequent developments extant -- were unqualified atheists. Can their mockeries of Christianity, their persistent blasphemies, be accounted for upon any other hypothesis?