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Note that the way that visitors are counted is not the same for the BWCA and the Q so you are comparing apples to oranges as far as a direct comparison.

But the Q numbers bear out the trend I've been noticing firsthand over the past several years.  Useage is dropping pretty fast.  I'm seeing far fewer and sometimes no people at all on lakes that used to be on the verge of being crowded.

There is a point where TOO few visitors would be a concern but we're not there yet IMHO.  If this lower useage remains the status quo we will probably see the park begin to feel a bit wilder again as the human footprint falls more softly on the land.