For us it was pretty simple. Zig-zag through the marsh in your canoe and drag it over about four beaver-made blockages. A bit mucky and WHOA the smell.....but no big deal. Takes about 15 minutes to get through.
Lake after portage: Bewag
Known campsites: not sure
Portage from Bewag into:
Portage into Quetico Park with QuietJourney.com