LAte 60's and early 70's I was using a synthetic bag, and I am sure my pack was nylon then. But what I remember about those days was sleeping in a tube tent, praying that there wouldn't be mosquitoes; cooking everything over an open fire, usually balancing the pot on three stones; and drinking water straight out of the creek, any where we wanted to do it.

And yes, jeans were what everyone wore in the mountains.