We just returned on Friday night from a 10 day trip with five of us (2 adults 3 children) and I wrote down everything we spent and kept receipts from all of our dining plan meals - here is what we ended up spending...
The total of our
DDP meals (45 counter service, 45 snacks, and 45 table service) came to a whopping $2015.31 - we paid around $900.
As for the money we spent out of pocket, we were at about $55. This amount included milk (we bought at the resort gift shop as it was MUCH cheaper than the food court - we were at POR), additional tips for some of the table service dinners,one kids counter service meal, treats bought in the different countries at Epcot, and 3 treats at Goofy's Candy store at DD.
We did bring along in luggage the small cereal boxes, dried oatmeal packets (got hot water from the food court), dried fruit, and granola for our breakfasts. We did use some snack credits for fresh fruit (grapes, oranges, apples) in the morning to go along with the cereals or oatmeal.
We didn't find the need to spend any more than that as the meals and snacks fill you up!