I actually have the area that is traditionally made into a bedroom as the "living" area. It is in the back and the last to get the heat.
I use the front dinette/gaucho area as my bed. It IS closer to the heater, but I rarely run the
furnace at night unless I have full hook ups. It consumes much power. Good bedding keeps my warm and happy, for the most part. I may run it at a low setting (45 or so) to keep things from freezing inside. That limits it's on time to a manageable power consumption.
My future plans are to first install a Wave 6 heater where the
furnace is now, on a hinge so I can use the space behind as storage, And I have considered a Wave 3 near the back. That will involve removing the converter I never use as a converter and rebuilding the distribution panel and fuses to another spot. I do not use that area as a bed, but a future owner may want to and the heater in that spot would be a danger if the bed was down. Something to consider, for sure. Another for sure... it's a very ambitious endeavor.
The previous owner had a curtain up across the back, as you have suggested. He used the dinette in the front.