I'm very pleased with my two new purchases. Picnic table (which I needed anyway for the washing basket when hanging out the line!) and a new air mattress to replace the 30+ year old one that wasn't staying inflated.
This seems to be a good hack for the SE without the false floor that the Trophy has. Table and garden chair almost bring the foot end of the air mattress up to the level of the folded-down seat backs - yes, really, the photo is deceptive. It wouldn't be hard to put something else in to raise it a bit more but I don't think it's necessary.
View attachment 25157
The new airbed at a nominal 185 cm is not too long for the space available and in fact fits in very neatly indeed. The mains-operated pump is a thing of beauty, doing the job in seconds, and also capable of sucking the air out to deflate it as well. Obviously it can be run from VtL.
View attachment 25158
I didn't bother putting a support under the head end because that's a solved problem, my flight bag will do the job, or a plastic box that can double as a container for food, kettle etc, and the kit when it's stowed away.
View attachment 25159
There seems to be plenty "headroom" above the foot end of the airbed. It's still on a slight slope and as I said that could be rectified, but it seems fine to me.
View attachment 25160
I'm five-seven. The full extent of the mattress is said to be six-two, though that might be a slight over-estimate. I fit in just fine and I would think anyone under six feet would be OK. Taller people might have to experiment with diagonal placement, as the OP suggests.
View attachment 25161
Now all I need to do is find out how to make the HVAC stay on all night. A problem for another day. (I haven't tried the "get out on the passenger side" and variants yet. I'm also wondering if leaving the seat belt fastened might do something.)