How to film a movie scene in a car?

I have just written a script that requires a scene shot in a car ride. I have three cameras, an iphone, a camcorder, and an actual film camera. I'm new to film making and I really don't want this car scene to look like something out of a reality show. If you have any tips or advice as to how to shoot this scene I'll appreciate it very much.

Place it on the hood, or in the back