Unfortunately, if you don't get the MYW package, including room and tickets for all in your party, you can't get the Dining add-on.
But, the DDE card might be a great alternative. It's available to FL residents and AP holders. The price is $50, and the card is good for 20% off at almost every Table svc restaurant at Disney. Some of the Counter svc places are included, too. You get a card, as does your spouse. You can use the discount for everyone in your party (up to ten people, I think), and there are only a few blackout dates- mostly major holidays.