Got back home to Canada today, might as well give an update while it is fresh in my mind.
We landed at Vancouver and for the first stage of dealing with CBSA, I told the agent that I was a national returning to live and my wife was visiting me for a while. She asked my wife absolutely nothing. She did not ask for any info about when she will be returning to Korea or her status of her PR application, in fact, she never asked if my wife has one in progress or even if she has a return ticket. She asked about how long I have lived abroad and if I had any unaccompanied goods. after stamping my passport, she instructed me to get the rest of my luggage and then go to the secondary stage of landing.
Next step, I got interviewed by another CBSA agent, who looked at the list of the stuff we were bringing in by ship, and he was fairly impressed with the list, even remarking that it was 'pretty good.' (detailed he meant) He did ask if we had any electronics or jewelry in the shipment, we said, "no." He asked again, we said, "No." He asked us 3 times in total and informed us that if we did, we needed to give very detailed description of them. I think he was just giving us fair warning that we were going to have problems if we 'forgot' to list them. He then went and got a generic piece of paper with instructions for picking up unaccompanied goods and wrote a phone number on it and said when my shipment arrived call them and follow their instructions. About my wife's PR, he did ask how long she was going to stay and she told him 6 months. I informed him that she has a PR application pending and he replied "eventually she will have to do a landing." He never asked for her return ticket or the status of her application, nothing else.