I did this on a DIY 9 day Missouri bow hunt last year in middle November, I am not a wealthy person so I had to be cautious on the money I spent since tags are like $300ish. I have a 2014 subaru outback with the seats folded down I fit two coolers and two big tubs along with my bow case.
For the camping portion:
I didn't sleep in my car each night because there is no insulation, but it does block the wind so I went back and forth between that and the tent. I slept in it a couple nights to try it out and it works well either way, I am 6' and had plenty of room. Other nights I used a coleman sundome tent 4 person
https://www.amazon.com/Coleman-Sundome-Tent/dp/B004J2GUOU?th=1&psc=1 and it worked pretty well, but it has great ventilation which sucks in the winter so I stuffed blankets near the windows. I used a small propane tent heater (and bought a CO detector at walmart just incase), make sure you put a pan or something underneath the heater for condensation. To sleep on I used an inflatable mattress from amazon (can't find the link, it was like 6" thick and inflatable) and I bought a nice north face sleeping bag good down to -20 and was comfortable each night. For food I used a my RTIC cooler with dry ice and had a freeze dried meals, bacon, eggs, protein packs, yogurt etc in there along with a rapid boil backpack stove from amazon
https://www.amazon.com/Odoland-Cook...ing-goods&sprefix=backpac,sporting,190&sr=1-3 for coffee. I also brought a coleman camping stove for evening meals.
https://www.amazon.com/Coleman-2000...goods&sprefix=coleman+cam,sporting,287&sr=1-1 Bring a few water jugs, I brought two 7 gallon and it was plenty. I bought a few led lanterns from amazon for the late nights of reading but ended up sitting in my car with the heat on charging my phone and reading/facetime etc (ensure to rev it a few times so carbon doesn't build up over 9 days of sitting if you don't drive). Overall I was comfortable each day and night at camp and going to do it again this year.
Scouting:
Start now and watch youtube. lots of it. take notes. Get on onx and find some spots that you think might be good based on pinch points, funnels etc. and find scouting info on the internet. I never scouted anything just showed up, found fresh sign, setup, tagged out. I didn't hunt mark twain forest but PM and we can discuss where I went, all sight unseen.
Gear:
I brought more gear than I needed for camp and will scale down this year. But, spend the $$ on a warm set of clothes. I did not do this and it was horrible at times. I used some first lite gear that was for hunting down here in Florida, then layered it. I wore thermals, mens wick ls crew, mens kiln hoody, mens sawtooth hybrid vest, mossy oak jacket and I was so %$&*& cold when I stood still it was unreal. I just bought the solitude insulated jacket and first lite balaclava and that will be a game changer (thanks POTUS for the stimulus). On the bottoms I wore thermals and mens guide lite pants, same deal so cold. Finally for boots, I completely disregarded the weather like an idiot and wore a pair of non-insulated redhead boots with two pair of wool socks. This was stupid af and I had to stop hunting because I thought I had frost bite even with a million sets of hand warmers. So I bought a pair of insulated 1000g lacrosse boots so that I can actually stand on my platform and not go back to camp. Bottom line, spend the $ on the good cold weather gear because you can always take stuff off but at some point you might be so cold you have to bail.
Final thoughts:
Bring more arrows than you think you need, I fell first day in like some drainage thing and thought I was going in the river so I used my bow to break my fall which ended up snapping every arrow in my quiver. Get a good pair of binos, I used these
https://www.amazon.com/Bushnell-Fal...ts&qid=1588466874&sprefix=bino,aps,185&sr=8-5 and they were great and affordable, but forgot a dang chest holder for them. If you use a camel back don't let water get into the hose because it will freeze almost right away, take a sip then blow it back into the bladder. Finally, make sure your vehicles battery has good CCA, mine was fine and I upgraded to a duralast platinum before I left and am glad I did, I never saw anyone for 9 days so a dead battery would have been terrible. Im sure im forgetting alot of stuff but ill add to it if I remember