I've hear tolls from the Orlando Airport to the Disney resorts is $2.50 (can anyone confirm that?) so if you're driving, you will need toll money. Other than that & tips, I've never needed cash for anything else.
Make sure you have cash for tips for Mousekeeping at the resort (they definitely deserve it IMO).
Oh, and I guess if you have kids, they may want to get those "pressed pennies" so you will need pennies & quarters for that.
I have lost the word for them, but the carts in MK where the person cuts out profiles. They take either cash or a credit card - no room charge. Maybe I should say this was my experience from two years ago. I haven't had another one cut on our more recent trips.
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