The High Sierra

So, for many years I loved my Stephenson's Warmlites. But they're bulky, and just recently the newest generation of Therm-a-Rest air mattresses, some of them called the Neo-Air, have become the best yet: warm, light, tall, comfortable, easy to blow up, and compact when packed. You can be about as comfortable as you are at home in bed. Always take one that extends from head to foot, of course.