Building a raised platform in the back of your van (or truck) will let you make the most of your storage space and also give you a comfortable place to sleep when you don't want to bother with setting up a tent or finding a motel.
Step 1: Measure (maybe even twice)
The first thing you need for a road trip is a good vehicle. We used Bertha, our 2000 Ford E-150 van - a somewhat reliable automobile.
We decided to keep one bench seat (so she could still carry up to 5 people) and remove the last row of seats to give us more room for the bed.
Measure the space you have available in the vehicle for the bed and make careful notes about any obstructions including the wheel wells, seat mounting brackets, etc.
If you already have storage bins, measure their height and width. You really don't want to build the raised bed and then find out your stuff won't fit under it!