Here's the deal. Buses start running, from resorts to the parks, by 6:30 each morning. BUT...these buses tend to run less frequently than the regular buses do. So, if you walk up to the bus stop, and the MK bus is just leaving, you could be looking at a 20-30 wait for the next one! For an 8am ADR, at MK, I would be at the MK bus stop no later than 7, 7:45 would be best. Getting to your ADR early is a lot better than stressing over being late!