Do all students have to take the Hogwarts express? Look at how far King's Cross is from Hogsmeade. Surely a few are allowed to use apparition with the help of their parents
Coasters-101: How the Hogwarts Express Works - Coaster101
Iconic Harry Potter Film Locations - An Itinerary | VisitScotland
Complete telling of the Hogwarts Express ride experience at Universal Orlando