I just got done putting in a TV stand for a 23" HD computer monitor I had laying around the house. We had to figure out something that we could do without drilling holes in the truck as the company won't allow us to drill any.

We ended up laying a 5/8" sheet of plywood under the mattress and using a couple pieces of pine to extend up from that at the feet and make a shelf. Used small bungees to the top bunk from some bolt mounts on the back of the monitor. Most of the weight is actually on the bungees and some velcro keeps the base in contact with the shelf.

Glad you like it. It honestly turned out better than I figured it would as we really didn't plan it out too much lol. The guy at the lumber yard was asking us what we wanted and I was honest and just said I really have no clue but this is what we need to do. He was pretty helpful. I've always worked with metal all my life and never really messed with wood.

Figured I'd add some dimensions in case someone needs them.

Cut the plywood to 6' 8" x 3'. Not quite an exact fit in the Cascadia but it's only an inch or so short on each side laying in the mattress holder.

The pine pieces were 2' long each but not sure how wide. They were about 5/8" thick as well. We had to put it up that high as I wear size 16 shoes so I have huge feet and don't want them hitting the shelf while sleeping.

I asked the guy at the lumber store about the weight of the plywood and he said the 4' x 8' piece was roughly 60 lbs. It doesn't feel that heavy to me though so I'm not sure. I've found online the general rule is 20-25 pounds per 1/4" thickness so 60 would be about right although ours is cut down a bit. Just something to think about when adding it to the truck.