I am going to be a senior in college next hunting season and will be unable to take my annual bow hunting trip in November. I have a few Iowa preference points and am planning on doing a DIY second shotgun season hunt. Since I have limited funds, I am most likely going to be sleeping in my truck. My question is; How can I stay warm at night? I have looked for battery operated heaters and blankets, but have had no luck. I'm looking for any suggestions.