Easy, no-construction minivan camping bed: If you need to carry a lot of gear use six 24-gallon Action Packers (like these: http://amzn.to/2jl2xWR) below one full sheet of plywood - we had two feet trimmed off the length. Top with some foam (air Mattress and memory foam is more comfortable and easier to fold away) and you have a perfect minivan bed. This is in a Toyota Sienna with the back seats folded down and the front seats removed. Glamping. Car Camping. Tiny living. van life. vanlife.
A box with a front flap that rests on the folded middle seats. A friend of his built this for $70. Copied from the middle of this post: http://thegroveguy.blogspot.com/2011/06/toyota-sienna-van-conversion.html?m=1