Pretty much everything is out now. That gave me a good look at the perimeter to see where water had been getting in. The worst was at the door. Probably due to a badly deteriorated door seal.
That clearly has to be replaced. There were a few other areas where water was clearly present including the front street side:
The front curb side:
And across most of the rear where the bathroom was - especially around the toilet area:
All in all it was quite a bit more solid than I had expected. I suppose we could do a patch job, but we signed up for the full-monty on this one and we want to be certain that everything is completely solid. So a bit more cleaning then we start planning for belly pan removal and inspection, then lifting of the shell. It may be a while for that though since we really need the weather to break first.