My 9yo DD2 is short for her age. She still rides in a booster in my and DH's cars. We are going to Orlando for 8 days and renting a mid-size car. We are staying in a few different hotels and at my ILs, who are 30mis from the parks. That will be our only driving. I was planning on bringing one of her boosters and just schlepping it on the plane, but also just really don't want the hassle. Would you bring one?