After it was all unbolted, it was still too heavy to lift the floor off by myself. So, I borrowed a skill saw and cut the OSB flooring wood just inside the 2" x 4" frame work. There were red chalk lines marking the framing, along with a trail of nail-heads. So I just guessed based on the width of a normal 2" x 4".
These are the OSB rectangles all stacked on a pallet.
As you can see, some of them had wood-rot ...
OSB just falls apart if it gets soaked with water.
These are the sections of 2" x 4" lumber all stacked up.
The really dark ones have wood-rot.
Here we are down to the metal bottom pan.
I had to knock out the remaining side boards
and then just rolled the thin steel up.
The steel frame is in surprisingly good shape.
This is going to require a lot less sanding than I expected.
Looking from the rear towards the front.
The very back tank is for "black water" ...
Since I will be using a composting toilet,
I will probably just remove this tank.
Next up:
1) clean up all the junk from the yard.
2) sell the scrap metal.
3) Sand and prime trailer as needed.
4) Check out brakes and grease hubs.