Hi
I am also interested in this question. I already live in Canada on a work permit and so all of my belongings are already here as well. Will be landing in a few weeks
You goods were admitted by Customs for the length of your work permit. By law, you should actually contact CBSA at an inland office with proof of "landing" and the goods accompanying and goods to follow. If you dont have goods to follow, you will probably get away with not reporting.
PMM