I wonder if a combo sleeping pad/trail seat would be a good idea? In an congested airport, usually the seats are the first to go. Having something where your not sitting directly on the floor hunched over would be a big bonus. Then undo it and you have a pad... hummmmm.... wish there was an rei around here!!!!
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"One should not increase, beyond what is necessary, the number of entities required to explain anything"
William of Ockham (1285-1349)