Well, we did it
Picked up the unit yesterday. They (Krenek RV) had de-winterized to show us all the features and had filled up the water tank. They offered to re-winterize but after chatting with them we decided to keep the water and go camping.
We now know what to do should it go back into the 20s, etc.
Thanks, everyone. You were most helpful!
Owners of a 2013 Sunseeker 3170 Class C beauty. We travel with two shih tzu, a leonberger and, oh, yeah, two teens and a 6-year-old.