September 12-16 - Walnut Valley Festival, Winfield, Kansas
Plenty of information at their web site.
October 4-7 - Winter Creek Reunion, Bennington, OK
Headliners include Fennig's All-Star String Band, Joe Collins, Grandpa's Neighbors, the Vanderveer Brothers, and the Boggy Bottom Babes. For more details, see the festival web page
November 2-3, 2018 - The 7th Old Mill Music Festival
Located in the heart of the Davy Crockett National Forest in Kennard, Texas. Musicians include: Rachel Eddy, The Purple Hulls, Spencer and Rains, Kristyn Harris, Stephen Seifert, Pipp Gillette, Roy Book Binder, The Vanderveer Brothers Stringband, The Laughing Lizards, Gaston’s Merrymakers, and Lloyd & April Wright. For more information: Lloyd Wright, Email: email@example.com, Phone # (936)222-8895 or April Wright, Email: firstname.lastname@example.org, Phone # (936)222-3110. Or go to their web site.