The parents of Isaac were Ephraim and Ruth Fults of Warren County Tennessee.
Goto GOOGLE and enter a search for "Warren County, TN - Biographies - James Campbell" and you will find information about Ephraim and Ruth Fults in that articles.
There is a lot of information in Warren County, TN public records (Will books, Census Records, Land Records) about Ephraim, Ruth and their family.
Also, the Carroll County Historical and Genealogical Society of Berryville, Arkansas has a nice biography of Ruth in its book: 'Carroll County Families, They Were the First'.
Ruth Myers was still listed in the Warren County, TN census in June, 1860.She came to Arkansas after that.Some of her children preceded her to Arkansas.She died in 1875 and is buried in the Sneed Cemetery near Osage, AR.