Road Trip Book 3 by Tamara Hart Heiner

Cassandra's family decides to take a trip to Disney World, and Cassie can hardly wait! But things start to go wrong on the drive to Florida when her family's van breaks down. They take a detour to her cousin's house, where Cassie discovers that having a crazy family might be one of the best things about her.

Readers of Junie B. Jones will love meeting Cassandra!