Me too.
Foodsaver bags and vacuum packer. Just be sure to let the filets freeze some before you seal them because the vacuum packer will suck that fish juice into it and it wont seal as well and you'll be throwing that thing in the trash once it starts stinking.
+1 Sometimes if the seal does not look real good, I will seal again about a half inch above the first seal.
I pre-freeze mine about 25 minutes on a cookie sheet lined with wax paper.
May seem like it is an ordeal but it is not when you considered will keep for years also the package is nice and flat