I am an experienced lightweight hiker/ tarp camper but fairly new to winter camping. I have given some thought to what I would like for a shelter system. This is for the Northeast, mainly the White Mountains and the mountains of Maine. I hike primarily with my girlfriend who is an experienced winter camper but new to ultralight technique, most of her winter camping was done in a luxurious (=heavy) freestanding, 4 season tent.
I'm thinking about a large pyramid shelter (9×9) with a two person bivy sack and a Ti tri inferno woodstove. I understand that this is not the lightest option but would be spacious, warm and provide us options in various snow conditions. The large mid would give us the room to sleep together on one side of the pole, which we appreciate, and be able to use the other side for gear and stove. We would be able to share some body heat without having to share a sleeping bag system (something which has failed for us in the past). We could also eliminate a groundsheet by using the bivy instead.
I got the idea for the woodstove with a mid from a picture in a forum post which I can no longer find. Does anybody have any experience with this? Obviously I would be using it with the door open, basically in the entrance way. I understand the wood gas insert makes the ti tri burn quite clean and smoke free. In more severe conditions (presidential traverse) I could skip the woodstove. This seems like my preferred stove choice for 3 season use as well.
My questions are as follows: Which mid? Which bivy? Any thoughts why this system would be less than ideal, or tips for it? Does anybody use a system like this?
After having read some posts on this I am considering sewing a sodcloth for more severe snowstorms.
Thanks in advance.

