Update:
On our 14 day trip from Wisconsin to Florida over Christmas, we did not have a need to run the Espar heating. Instead we just used the Water Heater Hydronic heat using propane to heat the water. The nice thing with the hydronic heating is that it is very quiet - while sleeping it is not noticeable at all.
At night we like the coach colder, so we set the thermostat to 55. In the morning we just set the thermostat to 70, the thermostat will kick on both the hydronic heat and the furnace until the temp is 66, then the furnace will turn off. That feature is nice to have as the furnace will bring the coach temp up much faster than the hydronic heat.
Also, having the hydronic heat use the water pipes was very reassuring as we drove the View back toward Wisconsin - no worries on freezing pipes.
So far - love it.