Just a thought. Not sure if you were thinking of portaging straight from BH to Cirrus. But it might be easier to go BH, Quetico, then Cirrus. If so check out the far northern end of Quetico.

Most of the campsites I would consider are documented in the PCD. The campsite across from Sue Falls was cleaned up a bit this spring. The portage crew had camped there with their chainsaws and cut up some of the deadfalls.