Wow, throwback to the "before drawer faces" and "before LC anchor bar" days of ADGU. Thanks for sharing!
@Lizzie108 Our go to recommendation for a flat platform at ADGU is the Megamat Duo (4" thick one). If you're using a makeshift setup or a DIY setup that's not quite flat, I'd be more inclined to go to the thicker pad, even if you're not a heavy person. If the sleeping surface is nice and flat like the SS1 systems, you can get away with the thinner mats. If the surface is broken up (IE stuffing blankets or pillows to fill the gap between the seat backs and a static cargo platform/drawers) then the standard thickness mats might not quite do it.
We've had some customers go all out with memory or latex foam as well. That doesn't pack up quite as nicely, but gives you a big bump in luxury feel if you have space to burn.