From Charles' blog:
"All of the original art will be on display and for sale, Neil will be there to read the text (and , one can only assume , other written delights) and I will be presenting a slide show discussing the visual evolution of his 18 line poem into a 32 page picture book."
I fortunate enough to see a number of these paintings at ComicCon a few years ago and I'm very excited to see them again.
I started an event page on Tor.om with some details -- I'll add more as they are announced.
RELATED:
Charles Vess Society of Illustrators lecture
Charles Vess and Michael Kaluta: 1001 Nights of Snowfall