I don't know what time the buses(transportation) starts running but I do know you need to allow a lot of time to get there using the WDW transportations system. Just got the Birbaum WDW guide book and they said at least 45 minutes from point A to point B, more time during busy seasons like Christmas, etc. Remember, there are stops in between....buses going to other hotels, etc. This is why my husband insists on a rental car. I think you also have to get to dining reservations 10 minutes early. With a 8 a.m. reservation you will have to leave early.