You should not use DTD as a transfer point for breakfast ADR's. Buses start runnning from DTD to some resorts around 9 a.m., but buses don't run reliably to all resorts until 11 a.m.
You should take the bus from your resort to the park nearest to your ADR, and transfer there. Buses from SSR to AK start around 6:30 a.m., and buses run frequently in the a.m. from AK to AKL.