Samuel ~
I'm aware the 1830 and 1840 census records don't give up much info. But if you are certain of your Samuel's wife, birth and marriage place and time. Then this Samuel could be his father. But if Elizabeth McDonald's husband died in 1801, then he isn't that Samuel.
Also, in the 1840 census, there is a John Ingram listed next door. He is the same age as your Samuel but he appears to already have a wife and kids. Could he be a brother of your Samuel?
This is far from conclusive, but the dates and location are good matches.
1840 census: "United States Census, 1840," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XHBF-BJT : 24 August 2015), Samuel Ingram, DeKalb, Georgia, United States; citing p. 52, NARA microfilm publication M704, (Washington D.C.: National Archives and Records Administration, n.d.), roll 40; FHL microfilm 7,043.
1830 census: "United States Census, 1830," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XHGL-KQX : 18 August 2015), Samuel Ingram, DeKalb, Georgia, United States; citing 68, NARA microfilm publication M19, (Washington D.C.: National Archives and Records Administration, n.d.), roll 17; FHL microfilm 7,037.
Just to add, I did see the surnames Little, Culpepper and McDonald in the 1830 census.
Marriage record: "Georgia, County Marriages, 1785-1950," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KXV8-3DP : 22 December 2016), Samuel Ingram and Susannah A. Crawford, 23 Nov 1842; citing Marriage, De Kalb, Georgia, United States, county courthouses, Georgia; FHL microfilm 365,269.