I have always had some form of pillow for use when backpacking and canoeing.  Currently, I'm employing a flannel "envelope" into which I stuff clothing.  

However, in the process of doing a repair on a Pacific Outdoor Equipment (POE) light weight, waterproof, pneumo bag I was wondering if that might be an easy and quick replacement for stuffing my envelop with clothing ... seal, insert, stuff into the envelope and add air to "taste."  It would be another use for one of those "air tight" bags, if it actually will hold air overnight.

Anyone try using one of those bags like this?

dd