Can someone help me find these missing Reeds?

In 1930 Carl(born abt 1884) and Emma Reed(born 1900)are in St Francis, Phillips Co, AR with three children Sam born abt 1920), Robert (born abt 1925) and Louis (born abt 1927). (There was possibly also another child Carl Jr born 1918 - but he is not there in 1930)

In 1920 they are missing. Her parents, Will & Mattie McDonald, are there in Helena, Phillips Co with the other kids, but Emma, assumed married to Carl Reed, is missing. Can someone locate Carl & Emma Reed in 1920? Any Reed or McDonald researchers out there?