There is a WIDE range of food prices at Walt Disney World depending on where you choose to dine, your appetite and your personal food preferences. You can get anything from a snack-cart piece of fruit for a dollar on up to the $300 meal for two my hubby and I had at Victoria & Albert this summer -- and everything in between.
Really the best thing for you to do to figure out if the dining plan makes sense for your family is to do a little math. The first step is to plot out a sample food plan for yourself for a day -- based on what you think you might actually eat at WDW.
You can find menus for nearly every restaurant at WDW on the
independent website allears.net. Go to that site and search on the word
"menu" and you'll find all the menus listed. On the menus, you'll find
the food items served, as well as
pricing. You can use this information
to map out some sample meals and compare whether your own unique dining
habits would make the Dining Plan cost effective for you.
There
are also menus given on the WDW website for some of the Disney
restaurants. As an example, you can download the menus for the
Whispering Canyon Cafe on the bottom right of the page found
HERE.
While you get to see the actual menus using this method, I find it more
difficult using the WDW site because you have to download PDFs rather
than just looking at web pages.
You may also find the information in the post
HERE to be helpful.