Would have had an actual update with pictures today, but the lumber store in town closed 15 minutes before I could get there to buy the stick of 1x2 I needed. Bummer....
On the other hand, I got the hardware I needed for putting it all together, and will be bringing the frame into the house to wrap with shiny reflective tape

Tomorrow I need to run to the lumber store, grab the 1x2, hit the hardware store (or Napa) up for a can of rubberized undercoat, then assemble and undercoat.
After that, run to the lumber store again, this time with assembled and usable trailer, and get a sheet of plywood, and have them cut it to size for me so that I can run it home and assemble them walls of my trailer. Need to remember to grab some hinges as well when I'm at the hardware store, for the trailer lid. Not sure if I am going to spraypaint the assembled trailer box or what.
Anyhow, more real details tomorrow, along with pics.