When was the last time you visited the USGenWeb pages for your counties of interest? It has been at least several years since I visited the page for Chariton County, Missouri, where my wife has ancestors. Upon visiting it today, I realized they had quite a bit of new information from the last time I looked.
Point your browser to http://www.usgenweb.org
and take a look at your states and counties today. There may be something new there.