When we flew to Peru to do the Inca trail, we didn't want to get anything crunched or crushed.

So we took everything out of our pack, then folded the pack into a large suitcase and stuffed everything else around it. Worked like a charm.
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Check our our website: http://www.backpackthesierra.com/

Or just read a good mystery novel set in the Sierra; https://www.amazon.com/Danger-Falling-Rocks-Paul-Wagner/dp/0984884963