Wife's been pushing me to do this with her for ages. Finally went to sign up and apparently we had missed the deadline to get the $30 off.
Just signed up using coupon code: DIRTY30 and it knocked off $30 from each of our tickets (even though that coupon had supposedly expired.
Figured it was worth sharing incase anyone else wanted to sign up.
See you in the mud!
Update: Firstly, being bad at understanding signals = would explain a lot - thanks for the advice guys ;/.
Also, Sydney too:
Maybe [VIC] tag?