Y'all are gonna love Texas
We thought the same with our dog. We’re both right here - his big sleeping pad in the back seat - all he does is sleep on it at home anyway.
Well, after two hours of traveling and one stop he figured out this wasn’t a normal drive in the car. We ended up giving him some pills from the vet. Helped a little but he was still stressed and wouldn’t sleep. But - he survived. When we got back home I think he slept for 10 hours straight!