My swing-out finally has a spare tire on it. I took some measurements, and found that I have enough room to stuff a pair of Rotopax 2 gallon containers between the tailgate and the spare tire. I can attach the Rotopax mounts to the A-frame of the swing-out.
I plan to mount the license plate in the middle of the spare. I need to build a mount for it, with a provision for a light.