While I cannot speak from experience, intuitively it would make sense for you both keep some bare necessities on your person. What happens if you get separated unexpectedly? There are people on this forum that have forgotten more than I will ever know about the backcountry and I am sure they will weight in, but that's my 2 cents...refunds are welcome...
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Did you know that 83.6% of all statistics are made up on the spot?