I believe that your 2nd great grandparents, M.W. Awbrey and his wife are buried in Mountain Park Cemetery near St. Jo. They were said to be there in a listing of Montague County cemeteries many years ago.
I would not be surprised that he was a Baptist preacher. Most Awbreys from this line were fairly devout. MY great grandfather, your 2nd great grandfather's nephew, was a longtime Baptist deacon, and my grandfather was a Baptist music minister for fifty years.