I haul my boy in the back of my Audi A4, not the roomiest car in the back seat, but he's only 130lbs so its not too tight; not much hair since i have him trimmed always, but there is slobber all over the place, in the head rests, in the windows (off of which he is ALWAYS hanging out), in the door panels, and yes, all over my arm and neck, so i keep a towel around... "don't forget to bring a towel"
I'm thinking of getting an old Cherokee, i used to have one and they r good and reliable, and if u fold the back seat the dogs have plenty of room and windows to enjoy themselves