We were there the 19-24 and we really didn't have any issues with buses. One day, it seemed like we waited a long time for a bus, but it was probably only 25 minutes or so. We watched the fireworks show at dhs and the bus line afterwards was really long, but we only had to wait for 2-3 buses and they came pretty quickly. More than once, when we were leaving the parks, we chose to wait for another bus instead of having to stand. My 3 year old was usually asleep in the stroller and we didn't want to stand holding a 3 year old. Even then, we never waited long for a 2nd bus.