Road trip vacation

C 💚

We are planning a cross country road trip from Florida to Montana in May. My LO will be 8 months old by then. His crying is a trigger for my anxiety and I don't want him to be in the carseat for "too long." We drive from Florida to south Georgia often so he is used to the 5 or 6 hours in the carseat. I know this trip will take 2 days or so. But, what sort of things should I plan on bringing for him? He's reached a point now, at 5 months old, where he hates being in the carseat. Any recommendations or ideas are welcomed!