Conversion vehicles fall into a category somewhat closer to the family car than to an RV, but they do offer some features that make them useful for family RV travel. While the most common conversion is usually a full-size van, full-size SUVs (the Chevrolet Suburban is a good example), and full-size pickup trucks are also now in this category. They generally only offer sleeping space for two with a rear bench seat that folds down into a bed. They do not provide cooking or bathroom facilities. They do, however, make excellent tow vehicles.

Conversion vehicles usually begin their life as a vehicle made by Ford, Chrysler, or General Motors. Conversion companies take basic vehicle shells and modify them into luxury conversions. They typically have plush seating, upgraded carpet, and custom window and wall treatments along with the latest consumer electronics. A van conversion can make getting there half the fun. Many come equipped with extra features like video game systems for the kids and headphone-equipped rear stereo systems for the parents. Extended roofs can provide more headroom.

When towing a foldup or small travel trailer, a conversion vehicle with a rear bed can provide overflow bed space.