Sometimes you will get lucky enough to catch a bass with a real fish in its mouth. Not too long ago on the lower Willy I caught a 3lbr on a grub and jig head. He came up with a little smolt in his mouth, about 3 inches long and mostly white with a grey back. I figured the Clack must of been it's home. I happened to have a matching swimbait (prerigged which I favor often), hooked it up and slayed 7 more beasts, then gently released them

.
I know at Hagg the rainbow pattern works great right after a stocking...don't be afraid to go big with that. I love a good catch and release there, nudge, nudge.
Good luck, send pics!