I have advice on saving on eating. reconsider the "3 squares a day" mentality. The dining plan may save a lot, but only if you were going to eat that amount of food anyway. (example, the counter service meals that come with the plan include a HUGE drink, and a sessert).
hubby and I split a funnel cake at leepy hollow (MK) for breakfast. we often snack when we're hungry, and have one "meal" a day. we also split meals. book a couple of the more inexpensive table service meals, but ones you get your money's worth, and pay OOP. (like Whispering canyon, Prime Time, Germany, Boma. Trail's End)
epcot has lots of places to get a sandwhich or pastry (norway, france) we buy a CS meal at the oriental station at sunshine seasons (Land Pavilion). it somes with 2 entress and 2 sides. we split it.
you can easily split a foot long hot dog with fries at Casey's corner (MK).
at your resort, purchase the refillable mugs.
in your luggage, bring some granola bars, slim jims, ie, thinngs you can snack on in your room. often the gift shop sells boxes of donuts, etc.
you can get free ice water at most CS in the parks (instead of spenind $ on soda).
you don't want o be tired for touring from eating too much, anyway. hungry? so what if you have ice cream for lunch? the food courts at the resort have great eals, too.
you can order a cheeseburger meal for one, and just a cheeseburger for the other, and split the fries. (they give you tons of fries!)
order a pizza from the food court, and put the leftovers in your room fridge for lunch the next day.
have lots of fun!!!!