I looked in the 1880 national index for Reuben Andrews, born TX or LA. There is only one. Lots of Reuben Andrews, though. No Annie Pointer born TX or LA. No Pionters at all. The LA guy seems a little young, but I will copy him, just to eliminate him. 1880 Census Place: District 12, 6th Ward, Caddo, Louisiana Source: FHL Film 1254449National Archives Film T9-0449Page 275D Relation Sex Marr Race Age Birthplace G. W. ANDREWS Self M M W 31 LA Occ: Farmer Fa: MD Mo: VA Mary V. ANDREWS Wife F M W 28 LA Occ: Keeping House Fa: AL Mo: AL Evaline ANDREWS Dau F S W 5 LA Fa: LA Mo: LA Reuben J. ANDREWS Son M S W 3 LA Fa: LA Mo: LA
Maybe your next best bet is cemetery records. Lots of them are being put on the internet. Just keep looking.