Can you fish all parts of the river with a MN license or do you have to have a wisconsin license to fish right now?
I am also pretty sure that several of the smaller bays on the WI side are not consider boundary waters and you need a WI fishing license to fish them. But that may have changed over teh years.
From WI handbook-
Allouez Bay,Superior Bay, St. Louis Bay Little Pokegama Bay, Pokegama Bay, and Kimballs Bay are considered
boundary waters and are regulated by Wisconsin-Minnesota boundary water regulations).
From MN handbook
St. Louis River (St. Louis County) fish sanctuary: No fishing
allowed at any time from the Fond du Lac Dam downstream to the
Minnesota–Wisconsin boundary cable. No fishing allowed from the
boundary cable downstream to the Hwy. 23 bridge from March 4-May
18. muskellunge: Minimum size limit 50" on only the Minnesota-
Wisconsin border waters. sturgeon: closed