Depending on the ages of kids and what type of eaters they are, you could probably get by with sharing meals. We used to do breakfast in the room until I realized that it was a lot of food and I could use my credits more efficiently, so now this is a typical itinerary for a Family of 4:
Day 1 (let's assume this is your first full day):
B=snack credits (either MSB on an MK day, or Starring Rolls on a DHS day)
L=CS (use only 3 credits)
D=TS
Day 2
B=TS character meal
L=CS (use only 2 or 3 credits depend on where we're eating--probably still full from breakfast)
D=TS
Day 3
B=CS (use only 2 credits and share a breakfast platter)
L=CS (use 3 credits)
D=TS
Because we use less CS credits at lunch we end up having an excess of credits, and thus are able to use some for breakfasts. Now some days will repeat depending on where we want to eat, and some days we might just eat breakfast in the room. Some CS restaurants are better than others (portion wise) for sharing, so here are my rec's:
MK
Cosmic Ray's (chicken platters are huge!)
EP
Sunshine Seasons
Tangierine Cafe
DHS
Pretty much sucks here, so we usually have to each get a meal, otherwise, we eat at Backlot
AK
Flame Tree BBQ
DTD
Wolfgang Puck Express (WPE) - I would probably eat every CS meal here if I could

, and the portions are HUGE, so you definitely don't each need to order a meal.
On our first year on the dining plan I packed a box of cereal and paper bowls and cutlery. Then my husband would run and grab a bottle of milk from the food court and we'd just have cereal in our room. This was fine, but the kids (and I) were sick of cereal by the end of the week, and we found that for the next time we didn't need to bother since we were stuffed using a credit each at every meal (except of course for TS meals since each person has to redeem a credit). The only benefit of the cereal breakfast was that we had a lot of free space in our suitcase at the end of the trip
BTW, we never use a TS credit for lunch (better value at dinner)...unless maybe for Le Cellier
