Pack all the clothes in one bag if you can. This will help minimize mixing things all up and having to dig through bags later
If it is available to you, renting a carseat or having someone bring one when picking you up. If this isn't an option, I have a great alternative- a carseat backpack! You can learn more below
Snacks are a must. This gives kids the option to eat or not and takes the pressue off them if they aren't feeling it due to travelintg