Well, I usually go to the BW, but I would still like to answer your question.   ;)

My favorite time in the canoe country, by far, is spring.  By that I mean mid-to late-June.  I am OK with putting up with more bugs to have the campsites be less trampled, the spring greens overhead, the spring flowers blooming, the loons on the nest or out with their fluffy little chicks, and everything cool and fresh with the feeling of new life in the air.  Days are long and nights are short, lots of time to travel and do campsite chores, and still be able to sit by the fire in the evening without feeling rushed.

Evenings are cool, nights are sometimes cold, and the mornings often misty.  Spring is my very favorite time.