Frozen boots are no joke. I have been winter camping my entire life, and I can tell you, that I have put myself into life threatening situations multiple times in these later seasons when I was younger, and not prepared for the reality of how nasty it can be. 4 degrees turns into -20 below real quick when you are soaked from sweating hard all day, your sleeping bag is wet from condensation and climbing into it in damp clothes and you have no place to dry out your soaked, frozen boots. You may not even be able to get them on your feet, which really sucks when you are stuck in a small tent and the only way to warm up is to get out and build a fire, which won't warm you much.
After getting 18" of snow on the opening day of 1st rifle 2 years ago, and a foot of snow on the hike in for archery 3 years ago... at least 1 hot tent in camp would be a wise move. You might be able to rent one if buying one for the group isn't an option. If you have a good group you hunt with, have everyone pitch in a couple hundred $$ and pick up a 6-8 man tipi and stove. One of you can always buy the others out in the future. You will enjoy your trip much more, and be able to hunt more effectively, instead of worrying about not freezing to death constantly. Bring a small folding saw like a Sven Saw to cut wood. Trying to gather and break off chunks of wood to build a fire while you are frozen and cold is brutal. Plan ahead for campfires. Get to camp and build a huge stack of dry wood under a sheltering tree and cover it with a tarp to keep it dry. Keep in mind pine burns extremely fast and won't last as long as you think it will. Also bring a good stash of firestarters for camp - egg cartons with dryer lint soaked in parafin work great, so does Pyroputty, I always keep a tin of it with waterproof matches, a lighter, and a piece of sandpaper for striking the matches in my jacket pocket.
Winter back country hunting is an adventure in its own right, with good, appropriate gear. It can be awesome, but also has a high degree of suffering, and higher risks involved. Testing out your gear on a controlled front country hunt, where you can bail to a warm vehicle as a safety valve would be wise before you commit to a deep back country hunt in the winter. Think about considerations such as getting snowed into your camp or needing to wait out a storm for days. Carry multiple means of fire starting, a good emergency blanket, and backup dry socks, gloves and a hat in vac sealed or double bags everywhere you go. Also, I would recommend watching some videos on dynamic re-warming drills and treat the winter survival aspect of it as an important research topic on par with researching the animals and hunting area.
You can have a lot of fun on hunts like this, and learn alot about your limits, but make sure to approach it with eyes wide open, and understand you are choosing a situation which carries elevated levels of risk on many fronts.