So I got some time to test the insulating that I did a while back, just have not had time to post for a while. Heating up is even faster in the camper, took it from -17c to +19c in about an hour, that includes opening all the cupboards and all the access points. Was very happy with that, as well once up to temp feels MUCH warmer. Then did a test when driving and was very happy as it kept the temps up when driving, the furnace was running to keep the temps up but they never dropped like before.
After looking into it some more, I find that this is about all that can be expected. Even with a stick house in -17c it cools off pretty quick when the heat is shut off so to expect a TCer to retain heat is not realistic. At least now the furnace can keep up with the temps.
Now if the temps would get out of the -20's and -30's I could head out camping and take pictures. Nice that I have a warm place to stay but freezing off my toes and fingers when shooting is still not fun!