You asked if kayakers listen.
Yes if I have before crossing Johnstone straight, or crossing to the Deserter group North of Port Hardy, or approaching Victoria. Otherwise no. I prefer to paddle with my radio off, and only switch it on when I need to listen or communicate.
If you are crossing a major channel, Coast Guard do not mind if you contact them and they will advise of shipping movements, but be sure to state that it is not an emergency, and that you contact them again once you have crossed safely. They will move you to a secondary channel, and you may need to wait while they deal with more pressing communications.
Daniel, I love the threads you start. They usually get a good conversation going.
Keep safe, but get out and explore.