Have a terrific and safe trip oh hearty soul..... Looks to me that you will be fine and dandy in your sleep cocoon. Also with your clothing system to wear as well, my opinion is that you seem well prepared. With the addition of the tarp tent and stove you are all set.
Living in Minnesota gives me a fair bit of cold to hang in and fall/winter is when I get more time to camp. Check my post on sleeping out last week in
-12o below, it is in the general hammock talk part of this forum. I slept really great and warm.
You are going on a dang fine trip. I got a wee bit of envy........ ok, more than wee. Hope that you post pix and a report when you get back.
I look forward to it.
To the North Woods!!