There are many types of camping cars. These are generally known as recreational vehicles or RVs, as these can be used for camping as well as other recreational activities.
The most luxurious and expensive type is the class A motor home. These are modified trucks. Motor homes are used for longer distances and for carrying a large number of people.
The vehicle built on a commercial bus is just another kind of RV. These vehicles offer larger space and luxury.
A campervan is a true camping car. Designed from a typical van, this vehicle has a raised roof. Sometimes in these vans, the backside is replaced with a coach occupying cabinet.