First have a wonderful trip in Dec.
The S'Mores bar came from the Main Street Candy Shop in MK. It was behind the glass counter.
Hubby and I are NOT breakfast eaters. We had our tea and coffee in the room each morning but we didn't eat. My son on the other hand eats BIG in the morning. So we packed our carry on with Pop Tarts/ Ready made cheese and crackers/granola bars/milk and cereal bars etc. He munched away and was fine. You could also bring some cereal and plastic bowls and buy a carton of milk once you arrive.
Yeah, unfortunately breakfast is really not a great use of a counter service credit. But, remember it's your trip and if you enjoy breakfast maybe you can use a snack credit to get a bowl of fruit with a snack credit, or maybe a yogurt...
Hope this helps some!