Lisa, I had a reply ready to post, but got popped offline so here's another in case it didn't get through.
The gist of it is that I believe your William to be a younger brother of my 2g-grandfather, George W. Bean b. 1806 (according to his headstone)in VA.That would make the 1850 census in error as to the ages of William and wife Elizabeth. LDS (also subject to error) has William b. 1814 in VA and Elizabeth Masters b. 1818 in NC.The census info on children agrees w/LDS, so that may be correct.LDS also has two other children after little William b. 1849.They were David Silas b. 1854 and Martha b. 1857.
Please feel free to email me if you think I can be of any help.