Even if there is a bus sitting there and no long line, you probably won't make rope drop. The lines to catch a bus are longest close to park opening. We had to wait for a second bus more than once for MK in the morning, especially early emh days. Several times, we got there just as the bus pulled off and had to wait. Also, even if it's there or comes quickly, you may have to wait for an ecv or wheelchair to load. I would be at the bus stop by 7:15, if you want be fairly sure to make rope drop. The lines will get longer the closer to 8 that you get there.