'Tis done! Well I had decided that the final job would be the curtains, put off for last as the job I most dreaded, namely learning to sew beyond replacing a button, like on my $5 yard sale machine. Anyway, I saw kitchen towels and the light bulb went off. I got these, on sale, lively enough to ease the heavy look of the walls. Later I realized that I could fold them over the rods, glue (!) them, set 2x4 uh, gravity clamps on the "seams", then later trim the excess. The next day I thought of using the cut-off part of each to make a fakey valance(?) using the same technique, and really like the result.
Until better weather comes, I may tinker in the garage some, hooking the kitchen sink to at least a cold water supply and/or a better drain. When it cools some, I need to check for a level ride when hooked to the tow vehicle, and I already know how to correct that if need be --without giving up any of the giant 1/2" clearance under the garage door.
Next I'll post in the section on what you would do differently the second time, then maybe post a shakedown camping trip or few.