I have not found my Reid family in Georgia. I believe my Elbert Reid's father [Elbert's wife Eliz Mullins] is the William Reid in 1840-1845 censuses of Pike county MS. His oldest child [Jesse Whatley Reid] is listed just prior to him in these censuses.
Others nearby are Hugh, Parris & William Thompson, John Sartin & [also Joseph, Alfred], Elijah Carney, Joseph May, William Barnes, Penelope Boon [or Brown]. I believe the Sartin and Carney families are from TN, but Barnes may be from Georgia. See the 1840 census for more families in Pike county.
In 1850, William Reid's his younger children and wife Elizabeth (unknown birth name) are in household without him in Marion county. I was assuming he had died, but now am not sure about that. The family is later in Lawrence county, but the mother is last shown in 1860 with daughter Sarah Reid Gilbert in Lawrence county.