The 1965 Ford Car, with a travel trailer. Anonymous / Ford Motor Company

The 2012 Mazda5 offers minivan amenities like dual sliding doors that help make it ideal for a family road trip. Spangenberg Photography / Mazda

Akio Toyoda, president of Toyota Motor Corp., with the Prius V midsize hybrid-electric vehicle, which gets an estimated 42 miles per gallon in city and highway driving, helping to make it ideal for a family road trip. It's also roomier than a standard Prius. Paul Sancya / AP

The 2012 Hyundai Azera has the most head and leg room of any large sedan, helping to make it ideal for a family road trip. Anonymous / Hyundai