Ok... so ME is a bus correct? What about carseats for kids under age 2? My older 2 still use boosters but they can do without on a bus. But what about carseat? Are there seatbelts to secure them? Can you ask for one? I'd hate to bring mine just for the to & from airport trip but I'm also way too carseat obsessive to npt have him in a seat for the trip to WDW.