I never thought any of this project would be easy! Already my mental gymnastics in deciding what to do next, how to do it, and what is best, has my brain flipping! My main support for each side of the bed frame is a 2 inch by 4 inch by 43 inch board bolted into the van frame. Because I want no new holes in the van, I stick my fingers into existing holes and simultaneously put a bolt and washer through wood and another washer on the inside part of  the hole …  and blindly feel where I can put a lock washer and finally screw a nut on to hold it all together! I only have to do this eight times! Here is why people doing these constructions are creating videos of their work … I no doubt would be more clear with my process if I did create a video, but that will not be happening! A peek of what it looks like. These photos show one bolt, the bed frame bolted in and with bed slats and some additional framing, and how I kept D-rings exposed for future use: