If you fish with a guide it is unlikely there will be any problems. Based on our 20+ years of fishing on our own, without a guide, we found the DFO officers became VERY "detail oriented" as soon as they found out we were not Canadian. Later, because of some physical limitations, we fished with a guide who was on a first name basis with DFO, no problems.
One of the lodges we used offered helicopter fresh water river trips. IIRC, everything was catch & release, a DFO rule, I think.