Mostly a rocket box with extras (clothes, extra stuff, maybe a stroller). Kid stuff.
Man, clever idea and a great execution.
I haven't read the entire thread, so forgive me if this has been asked, but do you think it would be possible to graft one of the roofs onto a truck topper?
You would need a really long topper. More than 8 feet by a lot. I also don't think a Fiberglas topper could take the weight when popped without flexing. But the limiting factor would be the length I would think.