GLC, I'll add my congrats to all of the above on committing to a century ride! It looks like you have your training well planned and underway. My first century didn't find me nearly as *trained* as I could have been, but I just decided to go, have fun, and do what I could.
My SO and I do a century in September each year down around the Va/NC border - The Great Peanut Tour - which is awesome. The heat is something else, but if you follow the advice of those who have posted before me, and take advantage of every single SAG stop, plus take nourishment and drinks with you, you'll be fine!
I'm in VA, but will have to check on Bikefest!
"The bicycle was the first machine to redefine successfully the notion of what is feminine. The bicycle came to symbolize something very precious to women - their independence."—Sally Fox