Hi, Melissa!
I suggest that you consider booking a stay at
Disney's Art of Animation Resort in a Family Suite. This will give you 2 bathrooms (!) as well as a mini-kitchen, allowing you to enjoy light meals in the room. We use a kitchen for a light breakfast or a snack after a character breakfast to hold us over until dinner, and our savings really adds up. WIth a mini-fridge and microwave in the room, you can even heat up leftover (if there are any) for later in the day as well.
Next, consider adding one of the Disney Dining Plans. You can save up for a known cost, rather than getting a surprise at how quickly your meal costs are adding up once at the park, if paying out of pocket. Those plans also come with a cost-effective Resort-Refillable Mug, which can be used at the fountain beverage location at your resort for free refills for the length of your stay. Currently, these mugs cost approximately $15.49 per Guest, but those on the Dining Plan get these mugs, 1 per person, as part of the Dining Plan. Great savings there, too!
We also bring our own portable food such as granola bars, small jars of peanut butter and jelly, cheese and cracker sandwiches, etc., for breakfasts. Pick up a loaf of bread at your resort's shop for early morning toast or sandwiches. Bring your own water bottles into the parks as well; just pick up a wide-mouthed, sealable cup for each of you and fill them with ice and water at the resort before you depart.
Finally, book a trip in September / October and you may find that an offer of free Dining may come along in a few months. If that happens, cancel your current reservation at least 6 days prior to arrival and rebook the new reservation, with no cancellation fee, as long as you've booked directly through Disney.
Send more questions, Melissa! I love helping Guests get the most out of their vacation dollars in WDW!