I always leave mine whole and vaccum seal them....Its just works better for me..Any size,it don't matter.

I have always left them whole, but I did something last year after my best friend experimented with them I used to take the shad and put them in vacuum bags then seal them, what we found out was during the process of vacuuming the blood and oils would  get sucked up to the surface of the Shad, now what I do is put them in the freezer let them get good and stiff then vacuum them, made a big difference, the other thing I do is when I'm ready to fish with them I fill the livewell and drop the whole vacuumed package into the water, makes for a very slow thaw and they will bleed real good when you cut them and they are not mushy, I follow the same with Skipjack..............Doc

i vaccume seal all my bait. if you wanna store bait id invest in one.
another thign you can do is a put a few in a zip lock bag and submerg the bag in a bucket of water {not all the way as you dont want water in the bag} just leave the top open and submerg the bag and the water will push out most of the air. not as good as a vaccum sealer but it works.