I wouldn't personally take the chance of waiting. We just spent 2 weeks in Arkansas with our trailer and I re-winterized in Missouri before our return to Minnesota. It was only 36 degrees! And 9 in MN. A coach might be less susceptible to freezing but think about the risks.
2012 F150 FX4 Ecoboost, 2016 Surveyor 274BHS
2003 Yamaha FJR1300, Demco Premiere Slider
1969 John Deere 1020, 1940 Ford 9N, 1948 Ford 8N
Jonsered 535, Can of WD-40, Duct Tape
Red Green coffee mugs