Long time BWCA traveler making a run into the Q for the first time this summer. Will be entering on Nym, up on the north side of things, so crossing the border in the truck...

Only last lingering thing I can't find any information on, is if my MN registration for the Canoe is good in Ontario/Quetico, or if I need to get something for it. Anyone know, or know where I might find out?

Your Minnesota registration is good for Quetico- Canadian registration not required.

No registration at alk required for canoes in Canada last I researched it.

And here is the proof that canoe registration is not necessary:
Interim Registration Guidance