Hi there. Good luck in your travels
Our boy is 3 and he has done lots of traveling with us. We actually travel from TN to PA at times for work, 10 hour drive one way.
We always make sure he stays hydrated and make sure we make stops for him to stretch his legs, potty and run a bit. We also keep some light cool air moving for him.
We take him a big bed (fave blankets) and toys to play with to keep him entertained ~ Also, I play light music for him, i think he likes it...must be soothing.
She will do great!! Safe travels to you and your little one.