Just got back and used the Rapid Rewards discount. Adult tix were 59.96+tax and children 51.96+tax. For 2 adults and 2 children I paid 238.40 total.
We turned in the tix for the 2nd day free.
They have a promo at the park of pay for a day, get the year (2009) free. So if you were going for more than 2 days (or planning another trip this year), you might want to consider that.
I've never seen online parking option, but it cost us $10/day to park in the "regular" section.