Howdy. Long time lurker, first time poster.
This one's still a work in progress. I'm about the farthest thing from a carpenter, and this thing has been a royal pain in the butt. :ar15: Lowes doesn't exactly have the straightest wood out there.
As it stands, I've got a structure of 1x10 pine with a thin sheet of plywood attached on the underside. The structure is secured together with wood screws and some contractor grade adhesive that seems to stain the hands pretty good (read the directions first next time - the blade on my Leatherman eventually got all of it off...).
The platform consists of three panels of 23/32" (or something like that) plywood, all cut from a single sheet. The center and rear panels are attached together with a piano hinge, creating a trunk at the rear. Two 1x2s were used on the underside of each panel to keep 'em from sliding around (they slip inside the structure).
I spray painted most of the visible wood black. Some pieces are still unfinished either due to error in judgement or various adjustments. The seams of the box have also been caulked for a little added water resistance. I'd like to find something I can paint on to the underside of the box to improve water resistance and delay decay. I'll probably add some foam tape or other weather stripping where the platform & trunk lid rest on the structure.
I've only got one divider in it, so far, creating the trunk space at the rear. Still deciding what I want to do for forward compartments. I'm planning on storage for sleeping bags/pillows/blankets and pads/memory foam along with other camping gear, vehicle maintenance items (fluids, parts, etc), tools, firearm/accessories, food, water, etc.
The platform and the rear structure panel are covered with Lowes indoor/outdoor carpet. A trip to the hardware store yielded the Blitz jerry can carrier which I bolted to one side of the trunk. I plan to get another for the other side. I've got an assortment of MFCs, MWCs, and Swiss surplus fuel cans, all of which should work in this inexpensive carrier. I'm also considering fabbing some panels that can be used to fill in these spaces for when they're not being used and to allow a little more platform space.
Nothing is actually secured down to the bed at this time. I've got some L brackets that I'll eventually get around to installing. Also, I haven't quite figured out how I want to go about securing the platform to the structure. I initially wanted to keep it all easily removable, but I think in the end, I'll just screw it all down to the structure and cut some access hatches in the panels. So much for simplicity...