Read the Canadian regs:

http://www-comm.pac.dfo-mpo.gc.ca/pages/sfg/default_e.htm

You have to land Canadian fish in a Canadian port - period. You can then process them according to the guidelines in the regulations and bring them back in your vehicle, but not in your vessel. Both our wardens and theirs are very serious about enforcing this, as otherwise too many fish would be mis-allocated, screwing up harvest reporting and ultimately shares between tribal/non-tribal. Don't do it - if you get caught it's bad for you, yes, but it's also bad for the rest of us when fish managers have to factor in mis-reporting.