Fairly recent interview with Wakefield about the early DC days with Red Allen et. al.:
There are many Wakefield YouTube videos available, also including live WDON broadcasts back to the 1960's; check out this link.
Legendary banjo pioneer Bill Keith played banjo on the Allen/Wakefield version of New Camptown Races on the '60's Folkways album. Pete Kuykendall, co-founder of Bluegrass Unlimited and under the performing name of "Pete Roberts," was the Kentuckians' usual banjo player at the time.