I've repackaged cheese before with no problems. I've eaten cheddar cheese after it has been in my pack for 2 weeks. Before going on a trip I buy what I need, cut it up in smaller quantities and wrap it in cheesecloth soaked in vinegar. The acid in vinegar retards any mold growth.

This works best with the harder cheeses.
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We don't stop hiking because we grow old, we grow old because we stop hiking. Finis Mitchell