Lake Lanier supports a crappie and bluegill fishery.  Crappie numbers may swing from year to year depending on the spawn, but there are plenty of fish in the lake to target them. Try fishing in the spring when the crappie move into the shallows to spawn.  It’s the easiest time of year to consistently catch fish.  Throughout the rest of the year, crappie will be found much deeper and they will become harder to find.  Bluegill and other sunfish are much easier to target in the spring too as the bigger fish will be shallow.  If you can find them deeper in the summer through winter, you can still catch them.  Plan on sorting through a lot of smaller fish to find the bigger fish that you could keep to eat.