I am planning on getting a dog and taking it on roadtrips like to camping. How do you take the dog on long roadtrips? What happens when they have to go? Where do the dog stay in the car? Where do dogs sleep when they camp? Tell me everything about how you camp with big dogs and little dogs. Thanks!

I have a great dane and am getting a small dog (12 pounds). He is very considerate of other dogs when socializing. But- just in case I would like to ask anyone who has a big dog and small dog how they got there big dog to be considerate (not step on, not bite, and to be easy playing) of the small dog. I would like to know about how people taught their big dogs that. Also I would like to ask how to introduce a big dog to a small dog. We are getting our small dog second, since we already have a big dog. Does that make a difference? Thank you.