Car sick doggy

So apparently we have a doggy who gets carsick. Not only does he get carsick, but he hyperventilates and fights us tooth and nail to even get IN the car. :( This makes me sad for our poor doggy because when he's in the car he just looks miserable and petrified. The only time he has to get in the car is when we go to the dog park and when he has to go to the vet. He loves the dog park and doesn't seem to mind the vet, so he must just hate riding in cars, not the RESULT of riding in the car. I've tried to bring a treat to give him when he gets in the car, but he won't eat them, and that's really saying something because this boy LOVES treats. He has thrown up on my car twice now, and he just looks soooooo sad afterwards. Poor thing. I'm going to do some research to try to figure out how to make the car not so bad for him because we're going to Clarksville on the 28th and it's about a 3.5 hour drive. The vet told us we could give him dramamine so we'll try that and see what happens. Let's hope he doesn't throw up in the car again..or worse. Yikes.