The Contempoary, Poly and Grand Floridian are fairly easy to get to for an early breakfast. Take bus to MK and then walk to Contemporary or monorail to any of those 3. If EPCOT is early entry, you may be able to walk through EPCOT to get to BC, YC, BW and Swan Dolphin. Thee other way which is not easy is to go to park for Early Entry and then take bus to resort for breakfast.