It WAS an interesting read. I have started my ditch kit as well. I have attached an "unslack pack" to the rear of my inflatable PFD. It's ultralight and attaches to pack straps. I think it is perfect for this application.
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One thing I noted in the story was his dependance on fish for food. That would go a long way in my opinion to surviving. I don't do well without some viddles. I have put 2 small little cleos and a roadrunner in my kit. My intention is to put a small spool of 8lb line in as well. The spool can act just like a fishing reel spool would and allow for decent hand casts. Hold the spool in one hand and toss with the other hand. Probably would work pretty well.