That is exactly what we are doing with our '06 Dynasty, right now. It is sitting in an RV park in SW Idaho with the AquaHot on with both diesel and 110V, front and bath temps at 60, rear temp at 55, all slides in, all umbilicals stowed except the power cable, air bags dumped, auto "gen-start" enabled (in case the 110V AC source goes away, since we're not staying in it), and the cupboard doors under the sinks and in front of the washer/dryer open for slightly more heat. We are expecting single digit overnight temperatures, in a couple of days. I may move the thermostats up 5 degrees or so, for that night.
Jim & Angie, Boise, ID
2006 Monaco Dynasty Countess III
2017 GMC Acadia Denali