If the only problem is the lights, why not just cover them with something?
I'm interested in taking kit with me so that I could sleep in the car if necessary. Right now I can't find my airbed so I haven't tried anything, but I have measured up. Bjorn (in that video) wasn't as comfortable as he could have been, because (as he says himself) he didn't push the front seats forward.
If you do that, and put the backs upright, there is a full 1.8 metres from the seat backs to the tailgate. I think one could get a (single) airbed in there, add a sleeping bag and you're sorted. Bjorn only had a sleeping mat, and I don't know how comfortable that would be.
You've got vehicle-to-load for your kettle or your microwave or whatever, you can watch videos on the entertainment screen, or listen to the radio or the USB music player. You can run the heating or the aircon. What's missing other than the DRLs staying on? I don't think these LEDs draw much power compared to the rest of that stuff, and Bjorn certainly did sleep in the car for one night and didn't end up with a drained battery.
Genuinely interested in the answer to this.