I think the buses are hit or miss. The year we stayed at the BC was a pretty busy time (right before Christmas) and the buses were shared among all 5 resorts the entire week we were there. The buses were always full with standing room only by the time they got to the BC. With that said, I have read various reports from the buses only sharing between the YC & BC to sharing among all 5 resorts and then everything in between. I don't think you will really know what it will be like until you get there.