OP, have you opted NOT to go with the all-day dining? You were posting questions about the all-day dining plan in an other thread, so it appeared that it was something you were considering.
Just a reminder that SW's all-day dining is unlimited (unlike Disney's quick service plan which has a maximum number of food entitlements per day). You can get as many drinks and snacks from the restaurants as you want throughout the day, so there really is no need to bring in outside food if you are planning on taking advantage of the dining plan. And if its a concern, not all snack foods at SW are unhealthy.....you can get fruit cups, muffins, side salads, pickles, etc. (or even a slice of pizza).