Mike mentioned most of the great spots. We cruised Lake Superior last summer and North and East shores are true wilderness. Don't forget Red Rock, way up north. Fun place and they have a big folk festival early August which brings camping musicians and stages set up with the real thing.. The grass roots folk music
. Then head
up the Nipigon River even further north, to cross the 49th parallel!!! A must do! And that's as far as you can go north on the globe, cruising/sailing in fresh water! Yea... The 49th!!