In 2013 we floated DIY for two weeks without seeing a fire ring, a piece of charcoal, a human footprint or a log or piece of wood that had been touched by an axe or saw. It really was the pure wilderness I had wanted.
We didn't kill anything but spruce grouse but it had nothing to do with opportunity.
That said, if I go to AK again it will be for a DIY fly in camp where hopefully the wilderness experience will be the same.
OTOH, there is another float waiting where an equally wild experience could be had.