If you really understand what living in a RV or a van really involves, you quickly realize several things:
* If you plan a long journey, it's still a lot of time spent on the road, and gas money. So it's not about just living in the wild, it's just driving and sleeping, which is not that great, and it's not what people mean when they mean to live in a van. It's a home that can move, but it's not meant to travel.
* It's better to keep a real home, use a station wagon to sleep in it or carry stuff, a bicycle, a tent etc, and not go too far from your home and still enjoy the wilderness, and do this for several months and still enjoy being in the wild without using a RV or van. A station wagon is not the full luxury, but it's still pretty nice.
The trend is on vans which are smaller RVs, but I really thing using a station wagon is largely enough.