2 questions..what is best rate you have gotten at Official hotels & late August ok?

[Camping Griswalds]

We've been to WDW in late August and due to so many southern schools going back in last weeks of August, the crowds were fine, the heat another issue though. Is Disneyland comparable crowds and weather wise?

Also what is best rate you've gotten at the official Grand California hotel?

We can't decide whether to go in August of 2008 or Jan of 2008. Thanks