Boundary Waters
From Burden's Landing
Kristin recommended a canoe trip here as a great vacation. Many, many people have since confirmed this.
Ed and I are going for our Midwest (July 2011) trip.
Outfitters
Recommended by Jacob Kaplan-Moss, David Evan Harris's friend:
How to Get There
The closest airport seems to be Duluth in Minnesota. It's expensive, as you might imagine. Minneapolis is about a three-hour drive away and is a cheaper airport.