Below is the link to the updated website. It now has a list of authors who will be at the National Book Festival. Some that stand out are Jodi Picoult, John Grisham, Ken Burns, Judy Blume, Paula Deen, Nicholas Sparks, John Irving, Sue Monk Kidd (Secret Life of Bees), and Lisa Scottoline.
I'll email again when I have more info. I'm going to get cracking on finding a price for a bus this week.