I slept in my sedan for like 2 months. I stored most of my belongings in a storage unit and only kept essentials with me in the car. I parked near a gym and used the bathroom and showers there, and would eat take out and use the fridge at work (I worked while I was homeless). I kept eggs in the fridge and would cook them in the microwave. This was in the winter time too so I would wake up with frost all around the windows. I made myself comfortable by buying a twin-sized Japanese/Korean floor mattress and pulling down the back seats (so it opens up into the trunk) and then lay down the mattress across the floor of the trunk and onto the backseats. I had a wintertime sleeping bag, but what really kept me warm was a fox fur blanket. Any real fur blanket would work. That shit kept me warm in the winter. I even had a cold one time while living in my car, that was miserable as hell. I also put a black thin blanket over the front seats extending into the back so nobody would see anything if they saw the car from a distance, and it also trapped the moisture from escaping. You can tell if someone lives in a vehicle by seeing condensation on the windows, that's how I can tell if someone lives inside a vehicle, and it hides that to a degree as well.
Don't get a van, it's too obvious and people will assume someone might live in there. Get an SUV at the most.
Now I am homeless again and was picked up like animal control at the local bus stop by the homeless services. Now I am in a halfway house and this is my room. And the second I come here? I catch a cold again.
Here is my room. I scrubbed the floor over five times and it's still like that. There's a certain smell to this room and the fridge makes everything taste a certain way. But hey I am off the streets and the other residents aren't stealing or stabbing me, can't really complain.