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I see cross-over with the world of ultracycling for weight weenie touring. It's nothing new or novel for them to survive multiple weeks, multiple conditions with very minimal packing. Something adapted from their philosophy would be probably way lighter than a tent from fancy materials on a classic 'touring' set up. Bubble wrap guy started from the point of trying to go further easier or something didn't he? Kind of the same principle.
Now that we know it's possible, is anyone in the thread interested in doing it? Probably not, because I'm the only one in the forum with an extreme weightweenie obsession. There are plenty of others at the weightweenie forum, but they don't attempt ultralight touring. They have a touring forum with no bikes in it. When I finish mine it will be the first. There's a legendary ultralight tourer with his own site, but he's a hard case who uses a scrap of bubble wrap instead of a Thermarest mat. I want to wallow in luxury, so I'd copy the Thermarest camp bed but use DCF and carbon. The camp bed would convert into a chair.