Wright Creek Baptist Church and Cemetery are located on HH highway in Jackson Township, St. Clair County MO. It is difficult to get to because it is nearly surrounded by Truman Reservoir.
To get to it you take C highway (just north of Lowry City, MO) east off of MO 13 and cross the Talley Creek bridge over Truman Reservoir.
After crossing the bridge you take a left on HH (north) and proceed without turning off HH. The Wright Creek Church and Cemetery are near the end of the highway.
This is the Topozone linkhttp://www.topozone.com/map.asp?z=15&n=4225339&e=447...
If it doesn't link you to the map, copy and paste the entire thing in your browser.
I also found these names on a rootsweb obituary list for Henry County.
McCLAIN, Sophia Frances FICK 1901-1996
McLAIN, Celia SMITH CHIPMAN 1909 2003
McLAIN, Fern MORELAND 1905 1994
McLAIN, Herbert "Becky" 1905 2000
McLAIN, Horace L. 1899 1902
McLAIN, John Van Cleave 1919 1992
McLAIN, Mary Katherine McDONALD TANNER 1913 1995
McLAIN, Ora Gene 1933 1934
McLANE, Catherine "Kate" n/a 1928
McLANE, Elizabeth Catherine MOORE 1829 1891
McLANE, William H. Col 1816 1898
I realize that the person you are looking for was in St Clair County but these might be related.