Like someone else said, there are busses running just for early ADRs. We used many of them on our last two trips. They begin around 6:30am and run in loops so depending on where you are at and where you are going, that would be the deciding factor of how long before the next bus came around. I was told that the dispatch has a list from the ADR system so they kind of know what they are looking at and where there might be people waiting. We found it best to be ready to catch the 6:45am bus because you just never know what is going to happen before or after it gets to you. If we missed that one, usually there was another around by 7:15am at the latest. We were never late and never rushed this way. We stayed at ASMovies and Pop and it worked great once we figured it out. If you have questions the front desk would be able to help you and if they cannot they will give you the number to the transportation department for further questions...that is what we had to do to make sure we understood what we needed to do. We even had a driver pick us up for one of our breakfasts, maybe Chef Mickey, and it was us and two other families and two of us were going to the same place and the other was going to maybe Ohana so rather than take us to MK and make us take the monorail to our destination, he dropped the other family off at the Poly and the rest of us at the Contemporary...it was very nice and gave us extra time to relax!