I have fished the lake lots, if you are after trout you can bait fish from shore, but hopefully you have a boat. If you fly fish, tow a crystal leech / wooly bugger on a full sink line slowly (type 2 or 3 full sink line is preferred) we always do well there that way. If you don't fly fish, trolling a cowichan spoon & worm can be dynamite out there as well.
Good luck!