This is in my van and I'm a carpenter so its set up for my usage. Not too specialised though.
I carry tools in my toolsafe, sometimes carry a motorbike in the back, sometimes I go to a party in a mates woods and sleep in my van and sometimes its got to carry a sofa.
So, with all that in mind, having it fully racked out in the back uses too much space up, not having a toolsafe means its too easy to steal my tools and having it setup like a camper is only good about 0.002% of the time.
So, anyway this is part of my answer to my problem. The metal bits are called clamp heads. All I need is a bit of wood an inch thick with holes where I want them and I have a clamp as long as the bit of wood I find.
This bit of wood has a bit cut out of each end so it fits into notches in ply that is fixed onto my Unwin track.

Then, heres my Unwin track, with my thrown together thick plywood bracket with notch for the end of the clamp timber.
Oh and there's one of the single tie down points, can't say I'm blown away by those. Bit waffy for high loads IMO. OK for hanging a dustpan and brush off though.

Here I've dropped them in place, they're at the same height as the lid of my toolsafe and it's a long wheelbase van so I can clamp a full 8'x4' sheet of ply in place so its not skittering about, or a door/large window. Obviously I set the part of the clamp with the thread on it at in whatever hole in the wood for whatever I'm holding.

And here showing the height better.

Like I said, this likely isn't the answer to your problem. Its an answer to mine, mostly.
Its also a work in progress so willl evolve as and when I get time and ideas.

