Rainbows like to cruise just under the ice, so if that's what you're after, find shallow water and setup just under the ice.
Trout will take most offerings if they are presented in the right manner.
Pin shiners (small), half a crawler or a whold trout worm, a few mealies or grubs all of which should be rigged on a #8-#12 hook.
The hook size will depend on the bait size.
I find that trout become more active the closer you get to spring, but that's just my experience.
Good luck, and don't forget micro tubes (red/white) and small castmaster spoons or swedish pimples for a more active jigging experience.