Open Question: How to prop pillows while sleeping on an air bed?

So I am going camping soon and will be sleeping on an airbed which is fine except for I prefer to have my pillows slanted at-least a little when i sleep and the air mattress I will be sleeping on does not have a built in pillow.In the past my ideas usually ended up with my head slipping down and waking up with a somewhat stiff neck.. I prefer to do that as little as possible. I have a few no cost ideas of my own for this year that may work but I wanted to see if anyone else had any better ideas first. Thanks.

Source:
http://answers.yahoo.com/question/index?qid=20110707232831AAjkCoD

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