Jon, I've been there done that, actually more than once.
I must love a little suffering once in a while.
Even though the walls are insulated with a good closed-cell foam, they can get cold in those single digit temps. It's also nice to have radiant heat as the floors can get damn cold.
On one of my past Newell coaches, it had came with 1/4" thick plexyglass covers that were held on by the little plastic mirror holders and it would help quite a bit. You can still get a little condensation build some times, but not a big deal. First choice would be dual-pane. I have had to resort to putting some thick corrugated boxes against the walls to help with the cold laminate. I'm not the biggest fan of laminate on the walls during the winter. The snowbird thing sounds much more promising don't it?