You can find trout in most river areas that run into Lake Ontario by the end of December.
I cant tell you exactly where to go, but Parks along rivers are a great start. Walk along the river where ever possible, look for "deeper holding pools" and then come back with your fishing gear! Fish move when the water levels are higher so keep that in mind when locating fish!
As for baits, I prefer to run flies and beads but some people use Roe. Pink worms also have their moments. Beads vary in colours and size from 6mm to 12mm, from natural to UV and glow. Use the smaller natural colours on clearer water days and big bright colours on darker days (overcast) or when the water is stained.
A bead may seem "tiny" for such a big fish, but that is all you need. Make sure you are running a light leader (I like to use a 5.6#) and adjust it according to conditions as well. (Gin clear water I use 4.4# some days, when I am catching many and the water is dirty I use up to a 7.6#). I use 8lb main line as I dont fish many "big waters" (such as the Niagara).
I also use a 13' Medium Light St Croix Avid (your rod length and action will let you use a lighter line) and a Center pin for a better controlled drift and drag.
Hope this helps!