I can't comment much on the Canadian dialect, but as a guy born and raised in Hancock, MI, one of the last stands of permanent residency that far north in the UP, I can attest that the accent is, in fact, as ridiculous as you have been told.
Ya der, eh? Don'cha know? (Only out of staters say that or it's said in jest)
Pasty, is pronounced like past-e, not paste-e. (that's right)
Needa cana Shkoal? (Ya)
Ur peckin' gee! (????)
You gun go shhtore? Gun go Walmart? (lots of dropped "the"s)
HOLY WAH! (More said in jest anymore)
Ya guy, were gun get us shum Dewskies! (ya guy???)
Yes, Canadians are WAY more liberal and own far fewer guns.
There is no point in going to the UP unless you like trees, hiking, or snow. (And don't you all forget it. If you're looking for anything else, go somewhere else.

)
If you DO go to the UP, the Keweenaw Peninsula in particular, you should go to Suomi Restaurant in Houghton. (prononuced Hote-in, with a very, VERY soft T sound from the back of your throat).
What you call a 'lake' pales in comparison to Lake Superior.
My wife is from the LP, and has never heard of a fudgie, and lived north of M55. She's a troll, and all Lower Peninsulites are trolls.
I get very upset when people from the LP say they're "Going up north", and that means going north of Standish, but NOT to the UP.
I don't have the accent, but if there's enough interest I'd be willing to imitate and record it for the world to see.