Is it possible that some of your information about Warren is incorrect?If he were born in 1903, he would have been only 14 during the 1917 WWI draft.Further, I could not find a Social Security Death Index (SSDI) reference for him with that date of birth.
However ... when I expanded his possible birthdate I found a record of what appears to be his draft registration card of June 1917.It reads (in part):
Smith, Walter W.
Born: 30 March 1893 (not 1903)
Place of Birth:Cockrell, Texas (not Arkansas)
Using that, I went back to the SSDI and found the following:
Walter Smith30 Mar 1893 to May 1970
SSN: 444-38-0516(Last residence in Idabel, McCurtain, OK)
I then explored the data files I have available for Hollycreek Cemetery and found the following entry:
Walter Warren Smith30 Mar 1893 - 6 May 1970WWI
Still kinda concerned about the Texas rather than Arkansas place of birth, I checked both the 1920 and 1930 census files and found that in each ... he listed Texas as his place of birth.
Anyway ... I think the Walter Warren Smith that I describe above is one and the same Walter Warren Smith you are gathering data about.
Oh, just for good measure ... here are the Smith burials at Hollycreek Cemetery (McCurtain County, OK):
SMITH, Betty Jo Oct3,1932 Sep 17,1994 m.James 11-18-1950
SMITH, Bonnie Sue Nov 26,1937 m.Carl 1-9-1954
SMITH, Calvert M. Nov 11,1907 Dec 25,1989 m.Gertie 4-29-1927
SMITH, Carl J. Dec 24,1929 Aug 14,2003 m.Bonnie 1-9-1954
SMITH, Charley A. 1860 1936
SMITH, Clarence William Jan4,1902 Jan 22,1936 m.Alice Lane 4-21-1923
SMITH, Dorothy Nov 11,1925 Jun6,1954 m.Harry K.
SMITH, Gertie E. Feb 16,1911 Mar3,1989 m.Calvert 4-20-1927
SMITH, Helen Irene Apr6,1919 Sep 26,1969 m.Kermit nee Stow
SMITH, James Palmer Oct6,1931 Apr 13,2002 m.Betty 11-18-1950
SMITH, Jess J. 1903 1961 WWII
SMITH, Kenneth G.
SMITH, Kermit Gray Dec 22,1910 Jan 14,1982 U.S. Army WWII
SMITH, Lena F. Feb2,1880 Jun 17,1956
SMITH, Mary June Apr 28,1927 Sep 21,1983
SMITH, Mary L. Jan 11,1850 Apr 26,1939
SMITH, May Sep 12,1884 Mar 22,1923 m.Walter G. nee Gray
SMITH, Nora Lee 1879 1957 nee Cole
SMITH, Rosie Jan 17,1848 Aug 20,1915 Top of stone missing
SMITH, Vivian E. Mar 26,1906 Jan 30,1934
SMITH, Walter Gray Jan 18,1877 Mar 23,1959 m.May
SMITH, Walter Warren Mar 30,1893 May6,1970 WWI
SMITH, William Clarence May 20,1902 Jan 29,1961
Hope this helps you in your endeavor.