I have those "straw to fill" pillows too. I fill them all the way up for reading in the sac by head light at night and then let out 50% of the air for sleeping. When I wake up in the morning the pillow has usually shifted and not under my head any longer, but so what, I didn't know because I was sleeping. I also find it quite satisfactory to put my pants and shirt in the sleeping bag stuff sack and use if for a pillow. It keeps them relatively dry and warm too.