I really like military style poncho liners, they call them Woobies. I have this one by Snugpak, but any surplus store should have some for cheap. I don't like the feel of wool blankets, the poncho liners are pretty soft. I use this alone in the summer, but it makes a good blanket for sitting around the campfire on cold nights.

For the summer months I'd carry a tent and this and for the winter months I'd carry a military surplus sleep system with your tent.