Excellent suggestions Gentlemen. I too learned that backing up my welds with copper really helped. Particularly while filling in the multiple drilled holes we all come across.
The patchwork welding on the side walls was going well. I did have to learn how to 'shrink' metal...

There were glaring problems with the floors and the hat channels. I just didn't think I was going to be able to make the thing look nice without addressing them. I couldn't figure out how to fix them without removing the tub. I thought about it for a while, then came up with this...

After pulling the tub, I got a good look at the damage. I purchased the front floor pans and hat channel kits from one of the vendors and started hacking away at them...


On to the cargo area.
The metal was pretty pitted and sagged horribly. I couldn't afford a new cargo floor, so I removed the damaged cargo hat channels, made a dolly that fit the ribs and started 'working' them back in to shape. It had clearly lost some strength, so I installed extra hat channels and supports on the underside. It turned out nice. This took hours and hours of effort. It saved me some cash and was a good learning experience.

I did have to fix my toolbox walls and a bunch of repairs to the fenders, but I didn't take photos. With regard to welding, I was pretty close to finished. There was just one more thing...