I've definately done some winter hitchhiking in Canada of all places in minus twenty two degrees celsius, that's like -7 in fahrenheit and pretty damn cold hey, wear wool, long johns, take an extra blanket as well as a sturdy sleeping bag, wool hat, mittens, layers, and extra socks and underwear and t-shirts cause you don't want to be wearing sweaty gear trying to sleep while it's cold. scarves are good too. Like widerstand said, lots of cardboard, lots...if it's snowing throw a layer on top of yourself too...good shoes will be a great thing too, now this list might be excessive I have no idea what Omaha's weather is like but shit Canada is fuckin cold except for the west coast, but with the right gear, which means lots of wool, wool hat, one of those button up wool military long sleeves, wool sweater, wool gloves, wool socks, wool scarve, you might be itchy but you'll be warm enough it won't matter.
