yeah! I always have a mini "survival" hammock for midday napping and campsite lounging. Rolls up into a little ball and weighs hardly anything. Not recommended for a whole night's sleep unless you're really in a pinch.

I use 9 feet of 4mm climbing rope on both ends as the nylon rope which comes with these hammocks is useless. (6 feet would be enough but the extra length is useful round thick trees etc).
In the second picture you can see the cheapo carabiners I put on as well, to take the hammock down quickly without untying the rope... good if you're staying in one place for a while.

"round-turn-two-half-hitches" knots work well. Picture 7..png

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here's one for $15: http://www.campingworld.co.uk/Models.aspx?ModelID=3743

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