Allen, I am also a descendent of David Bright Sr. from Fairfield County Ohio and can confirm that he did marry Susanna Reber on 9 Feb 1806 at the Trinity Tulpehocken Reformed Church in Berks County PA; this marriage was performed by the Rev. William Hendel and appeared in the Reading Adler newspaper on Tuesday, Feb 25, 1806.
David and Susannah are both buried in the Bacher-Baugher Cemetery, Greenfield Twp, Fairfield Co, OH.I have visited this cemetery and have photos.David died 17 Jun 1825; Susannah died 17 Jan 1869.David's stone is almost illegible; however, an early transcription and the fact that he lies next to Susan is good evidence that this is his burial site.
You are correct, David & Susanna had 2 sons and 3 (or 4) daughters: John B. born 12 Dec 1810, David Jr. born about 1812, Mary (Polly) born 27 Jul 1807, Sarah, born 1 Nov 1816 and Susan.I am descended from Mary (Polly).
If you wish to exchange information, I have additional information regarding this family in Fairfield Co.Margy