Why did Amos Diggory not use Side-Along Apparation?

In Harry Potter and the Goblet of Fire, Amos says:

Had to get up at two, didn't we, Ced? I tell you, I'll be glad when he's got his Apparation test[...]

I can infer that they had to wake up early to get there on time. Therefore, they had to use some other form of transportation that was not instant. Why didn't Amos just use Side-Along Apparation. It would have made the trip quick, and they wouldn't have to wake up so early.