Interesting technique. I so enjoy snuggling back under the covers for another 10 we've adopted a plan that heats the cabin at the same time. I sit our Coleman Propane heater on my (sliding door) side on top of the port-a-john (behind the passengers seat), while the Admiral has a big pot of water sitting on the stove put there the night before. I can reach out and hit the heater starter, while she lights the stove. By the time the water is hot enough for bathing, the cabin is warmed up from both heater & stove going the same time. In the meantime, we enjoy an extra 10 minutes under the blankets.