Be sure to stop out @ Bottineau Lumber where I'm currently constructing the Trapper's Cabin; my latest design.  This cabin features a very low ceiling, 8 feet at the center and 6 feet at the sidewalls.  By providing a low ceiling to keep the heat down by you instead of up in the rafters when nights get cold.  Its' large 3 foot roof overhang provides sheltered storage on either side for wood, canoes, 4-wheelers, etc. plus the extended roof at the front allows for an 8 foot covered porch area.  This cabin is designed to be built on a concrete slab.