For a well set camp site, the only time a canvas tent with stove gets too cold should be if it is out of fuel, or you are too far from the stove (the back corner).
Weather proofing includes getting out of direct wind, sealing the wall to the ground to reduce drafts getting underneath, properly taut roof to reduce sagging/snow buildup, and making sure the stove draws well and doesn't throw sparks. I have heard stories gleefuly told of a tent on fire, with narrow escapes by the occupants (neighboring ranch hands who got themselves too tipsy, and decided to load the stove over capacity)
Weather proofing includes getting out of direct wind, sealing the wall to the ground to reduce drafts getting underneath, properly taut roof to reduce sagging/snow buildup, and making sure the stove draws well and doesn't throw sparks. I have heard stories gleefuly told of a tent on fire, with narrow escapes by the occupants (neighboring ranch hands who got themselves too tipsy, and decided to load the stove over capacity)