I paid for my passes a while ago and just found out we won't be able to attend this year. I have an email directly from Dave Bryson stating that he'll honor a ticket exchange at will-call if I can find buyers. If you buy, I'll email him your name and you'll be on will-call instead of me. I can forward the confirmation emails for both passes (they were bought at separate times) and the email from Dave for you to print out and take with you - there will be no issues with entry.
$175 for both tickets - this is pretty much the cost of only one pass, so great deal!