Klymit Lightweight Static V Sleeping Pad

You might want to buy two. Once deployed on the ground, you might loose sight of it.

I use nothing but Klymit pads and Snugpack jungle blankets in my emergency bags. When you can get them cheep, even the pillows are nice. Light, take up not much more space then a soda can and inflates with 12-18 breaths. Beats sleeping on the ground for sure. I use the insulated version(s) so I would toss in a mylar emergency blanket to put between you and the pad if used during the colder time of the year.