I had a great week with son and 5 other scouts in the Boundary Waters Canoe Area Wilderness and the Northern Tier high adventure camp.
It's physically tough not just canoeing but also portaging. This is the many, many lakes between Minnesota and Canada. You carry your canoes and gear to get from lake to lake. It's the only way to get there other than sea plane.
Just an incredibly beautiful place. Here's a sunset from our campsite and a sunrise view from my hammock.