For anyone who still checks back here, here is the event page for the alternate GoS show taking place indoors: http://www.last.fm/festival/3333640+Apocalypse+Fest
This year's Gathering of Shadows has now officially and unfortunately been canceled. Official announcement regarding cancellation: http://www.facebook.com/permalink.php?story_fbid=394378513942724&id=148172615229983 - I hope those who are not on Facebook are able to see this news before booking any flight or travel accommodations.
This is an invite-only event. Send an email to firstname.lastname@example.org to RSVP so you can receive directions to the event location, etc.