Didn't have a pin code. I just called. as i posted i changed my dates from june because i was worried about the heat and i just asked. Also a trip has to be booked before Nov 30 2012.
I received an email earlier this month that offered free dining for several dates next year. The last block of dates ends 9/28. I have until February to book. Never hurts to call and see if you have a PIN attached to your name if you didn't get the email.