soundguy0918: "You are in a prime sightseeing area. The obvious one is Warrior Hill and the pictos nearby. To the west are some sandy beaches and to the east cross Iron and do the Bottle Portage to Curtain Falls. You can visit Rebecca Falls with a RABC day permit. Great paddling all around. You can’t go wrong with any of the island campsites there in Tiger Bay, but you will probably see a lot of traffic."
+1 Curtain Falls on the east end of Iron Lake. Single portage day trip from Boulder Bay to the top of Curtain Falls is about 3 hours one way.
You’d need both an RABC permit and a Quetico permit to venture into Quetico from the US side.
You can buy an Ontario Parks summer vehicle day use permit online (one per canoe) that can be used for day tipping into Quetico but you still need the RABC permit (each person needs their own).