I didn't want to leave my last posting without a followup because I don't want it to mislead researchers.
Although I am still following up with my theory that Charles Jackson Roper was the son of Thomas Raper and Catherine McDaniel by having a DNA test performed with the Raper family group, I no longer believe that William P Roper was the father of Thomas Raper. This is based on a Raper DNA test that is not consistent with William P Roper being the father.
Instead, it now appear a William Raper, b. abt 1775 in NC, who married Sarah Adelaide Standridge, b. abt 1775, was Thomas Raper's father. For those wanting to follow up on this, they can go to the Raper message boards at Rootsweb.Ancestry.com