Hi John -
Right now, the Coronado Springs resort restaurants are not showing up as active Disney Dining Plan restaurants for 2014, but it may not stay that way. Sometimes, it takes a bit of time for restaurants to be added to the plan, and Coronado Springs was included in the 2013 Disney Dining Plan.
If you are looking to prepay as much as possible, the Disney Dining Plan is a good option. If you get the standard plan, with one snack, one quick service, and one table service meal you'll still need to pay some out of pocket. However, it will cover much of your meals, and I'd expect that you won't be eating too much at your resort.
Most of the restaurants on property also take the Disney Gift Card, so you can also purchase those for your trip. Visit the
Disney Gift Card website to learn about where you can use the card.
I hope that helps! Have a great vacation!