In reply to JFort:
If I'm wildcamping then it's clothes in the sleeping bag stuff sack.
The Alpkit Airloks are quite good because you can seal the top with a bit of air in the sack, which adds more comfort (it does deflate over the course of the night though).
That said, if there is ANY way I can get a normal pillow into the tent, I'll do it! A decent pillow makes quite a big difference to how I sleep.