We've never had a problem using disney dollars anywhere on property (resorts and parks). The great thing is that they give you change back in real money so if partially into your trip you feel you have too many, just keep breaking new bills and you get the change back in real money. We usually accumulate quite a few disney gift cards and disney dollars for our trip plus we have the disney rewards dollars from our disney credit card. We use the rewards dollars first since they do expire, then we use up our gift cards, then we use the disney dollars since we can get change back in real money if we don't need all of them.