This trailer is a little bit different in most ways...one of which is that all the wall panels were securely glued to the wall framing.
Most trailers rely on staples and "twisty nails" alone, but the wife didn't like the look of the exposed twisty nail dome heads, so we will "rebuild it the way we found it" and use lots of Titebond III wood glue and staples/brads to secure the panels.
Removing the old panels is tedious as you must remove many staples and glue residue. Luckily, we have a "staple power" fairy in residence, so it goes pretty quickly.
The curb side wall took 2 days to repanel, with a light rain and windstorm interrupting the progress.