All Disney Resort have "character breakfast" buses that run earlier than regular park buses.
Buses begin running @ 7:00am to Epcot, Animal Kingdom, & Hollywood Studios.
Buses to Magic Kingdom begin around 6:30am (although others say they can start earlier than that - 6 to 615am). This will get you to Monorail Resort Breakfasts by walking to Contemporary or riding the Monorail to any of the 3.
You shouldn't have any problems getting to your ADR. We had the same time ADR back in December (stayed at SSR) and had plenty of time. Remember to give yourself some time to make the walk all the way back to Norway. It took us with 2 kids, 2 and 6 years old, about 10-15 minutes. My husband usually walks ahead of us to check in at the podium if we feel we might be running behind.
Hope this info helps!