I salvaged some thick wide pine shelving from a skip (about 6 lengths about 20mm thick) and my wife and I spent a very comfy night in our spacious home made Mk3 at bench level, (instead of squeezing under the thwart of our Mk 2 boat). We had lilos so we had real comfort and still had the boat filling option covered 😀 . The advantage of the extra surfaces for food prep and eating were good too. Obviously a bulky solution with storage under the foredeck but for comfort and space and a happy partner I’d rate it, and of course you can store stuff under the bed overnight (though hopefully not in a puddle). I only got the boards ‘cos I was thinking of sticking the twins there for a night’s experiment, but I’m not sure they’d go for it.