Just did that hence Newquay, did an online search for camping pillows and apart from an american one I've done them all. There's a place in the market if someone comes up with a pukka product. Bringing my own.
Just buy a 3 litre box of wine, drink it(obviously), take out the bag, inflate, and Voila!!! . . . . If its a bit small, just repeat the steps above, even if you dont reach the 'inflate' stage, after completeing step 2 you wont notice!!
I have a couple of fleecy camping pillows .. come in their own bags .. rolled up into next to nothing .. cost about £4 each .. easy to wash too .. not made of cold plastic that you stick to .. got them from go outdoors
always have a fleece jumper or jacket when camping,,,throw a few soft clothes in middle and perfect soft pillow,,,but if peeps can worry too much about pillows then all i can say is drink more night before then all you have to think about next day is your headache !!!!sorted !!