All my salmon/halibut/ling/etc gets vac sealed and frozen right away, (normally after "lounging" in the reefer in my "paper towel lasagna" for 2-3 days to harden pinbones for pulling). I cut all skinned slabs into 5" pieces, vac seal, and store in -15°F. Doing it this way gives me a piece of meat that I can use several different ways, (blackening, grilling being the most common), including cutting into bite sized pieces for smoking. This method has not failed me...I've even had a few stray pieces come out of cold storage after 2 years and still demonstrate the great taste/texture that I demand. Can't speak highly enough about vac sealing, even when it involves double vac seal sessions.
P.S.
Just vac sealed about 80 each 1lb+/- bags of halibut caught this morning....my neighbor's four bag chamber sealer did it in about one beer!