Bladen is a burned county-as you may know by now. I have found very few books on it-(I have Pridgeon,Cheshire, Faison and others there) Some in the NC Archives in Raleigh and some at DAR Headquarters in Washington D.C.
There may be a few more out now-than there was.
Robeson Co.... My husband's Hill's come from there. Archibald whose brother Slaugther wound up in Macon-and he Talbot.
But I don't envy you in either county in NC research!