Nah, I'll tell you anything you want to know. Like I said, I'm from British Columbia. So I should mention that skookum is the only word I've mentioned that is basically exclusive to this end of Canada.
Skookum is more or less an outdated word, which would probably be used nowadays in jest or just to be silly. It means "cool", as in that's pretty skookum. But given it's sorta dated, so it probably translates better as "swell", or "groovy". Not that using the word "skookum" references a time period like those other words, it's just got a fair bit of age to it.
The rest of these are found all across Canada.
Tuque = a winter hat. I'm wearing a tuque.
Keener = Someone who's really enthusiastic over something. Aren't you just a little keener.
Chocolate Bar = Candy Bar. Want an chocolate bar?
Runners = Sneakers/Running Shoes. I've got to tie up my runners.
Eh = okay. We're leaving now, eh.
Eh? = Okay? / What? / Huh?
"Eh" isn't as big in BC as it use to be, so we tend to slip between using eh and just saying okay. It's still big in the rest of the country though.
I think this might also be helpful.
It's got a whole list of names and words we use differently from you. Everything below the "Vocabulary" section is pretty much common across all of Canada. I'm suprised how many I identified already.
The best way to make a guy sound Canadian would be to basically write him as you would an American, but just replace any of those listed words into it's Canadian counterpart. The more mundane the object, the better.