These pieces may help with your search:
The United Confederate Veterans Association was established in 1889 as a benevolent, historical, social, and literary association. It was active from 1889 to the mid 1940s. Its mission was to "unite in a general federation all associations of Confederate veterans, soldiers and sailors, now in existence or hereafter to be formed; to gather authentic data for an impartial history of the war between the States; to preserve relics or mementos of the same; to cherish the ties of friendship that should exist among men who have shared common dangers, common sufferings and privations; to care for the disabled and extend a helping hand to the needy; to protect the widows and the orphans, and to make and preserve a record of the services of every member, and as far as possible of those of our comrades who have preceded us in eternity."
http://www.lib.lsu.edu/special/findaid/u1357.html
UCV Camp L. P. Thomas, No. 1467 was established between 1897 and 1903, and based on the camp number, probably closer to the latter.
see Organization of Camps in the United Confederate Veterans at http://onlinebooks.library.upenn.edu/webbin/serial?id=ucvcamps
LIST OF ORGANIZED CAMPS OF THE United Confederate Veterans CORRECTED TO AUGUST 31, 1921
Name of Camp. Division. Headquarters. Commander. Adjutant.
L. P. Thomas Ga Norcross, Ga T. T. Key
https://archive.org/stream/listoforganizedc01unit/listoforganizedc01unit_djvu.txt
Stephen Tilly McElroy (1844-1929) was the camp commander for many years; also founder and president of the Bank of Norcross, and a president of the Norcross chapter of the American Bible Society
Here's an obituary of a member:
S. C. Martin, Gwinnett County
Norcross, Ga., February 7.--Mr. S. C. Martin, a prominent citizen of Gwinnett county, died at his home Sunday morning of heart trouble. Mr. Martin was a confederate veteran and a member of the L. P. Thomas camp; he was 68 years old, and is survived by his wife and several children and a large family connection. The interment was at Mt. Carmel cemetery Monday afternoon.
[Source: Date: 08 March 1910, Paper: The Atlanta Constitution, Georgia]
http://genealogytrails.com/geo/gwinnett/obits_military.htm