We had no problem with it fitting in the fridge. I would suggest trying to freeze it if you're driving though. The freezers at Disney will not fit it. We used my Mom's house to freeze it before hitting the road. Keep the fondant on from travelling as well. That way, when you get home and get the thing into storage, you can pull the fondant off. It will protect the buttercream while you are travelling so that it doesn't all end up on ine side of the box....