Cast Member rates are pretty steady the entire year. Occasionally a few select hotels for a season get discounted with a code but I wouldn't really add them in the equation as they don't do 'get a deal for tonight only' type of stuff.
Yeah - ever look around the parks at kids aged 2-8? They ALL wear Cars stuff. My son lives and breathes it - almost a scary passion. Art of Animation Resort with the Cars area is just as good as CarsLand for him.