Pearl and Grand have some piggies in them, too...and they should be sitting in the shade under the docks by then. Big Fish does, too...in fact, ALL the lakes have pretty solid LM fishing around here, and I'm not sure that one is inherently better than another.
Above Sartell can be dynamite for smallies, but a lot depends on your boat...if you have a bass boat or one that rides pretty shallow, you can go far enough north to get into some fast current (and therefore better fishing, in my humble opinion). If not, you can still catch lots in the deeper, slower water above the Sartell dam, but I don't think the fishing is as good up there than it is in the shallower, faster sections around town.