It sounds like you already know quite a bit, so I don't know if I'm just giving you information you already had, but here are a few census records from FamilySearch.org:
I cut and pasted the transcription of the records, but if you want to see what each number or place means, you should look at the actual document. (For example, the 17 after Dock's name is for the number of years he's been married.)
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/3:1:S3HT-D5YQ-LG1?cc=1325221&wc=9BQ2-16X%3A1030553601%2C1030553602%2C1030599801
: 5 August 2014), Texas > Bastrop > ED 11 Justice Precinct 6 > image 21 of 41; citing NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.).
Dock Johnson 1900 Male 35 Married White Head 17 Feb 1865 South Carolina 1883 South Carolina South Carolina
Fannie Johnson 1900 Female 35 Married White Wife 3 17 Oct 1865 Alabama 1883 Alabama Alabama 3
John L Johnson 1900 Male 18 Single White Son Jun 1882 Alabama South Carolina Alabama
Travis Johnson 1900 Male 15 Single White Son Dec 1885 Texas South Carolina Alabama
Ethel Johnson 1900 Female 9 Single White Daughter Feb 1891 Texas South Carolina Alabama
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/3:1:33SQ-GYB9-RNY?cc=1727033&wc=QZZH-BCW%3A133641501%2C139261701%2C133641502%2C1589088942
: 24 June 2017), Texas > Henderson > Justice Precinct 1 > ED 11 > image 1 of 50; citing NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.).
D P Johnson Male 46 Married White Head 1864 South Carolina South Carolina A 1
Frances Johnson Female 44 Married White Wife 1866 Alabama A 1
Travis Johnson Male 16 Married White Son 1894 Texas South Carolina Alabama A 1
Hettie Johnson Female 18 Married White Daughter-in-law 1892 Texas Tennessee Texas A 1
Ethel Johnson Female 20 Single White Daughter 1890 Texas South Carolina Alabama A 1
Edith M Johnson Female 0 Single White Granddaughter 1910 Texas Texas Texas A 1
I think there were several more records, but I wasn't sure what you had already located.