I am not sure if Silver Dollar City needs a second playground area, but they definitely need a better one that is comparable to Tom Sawyer's Landing. Let's face it, as great as Geyser Gulch is, it is still a one hit wonder so to speak. The main attraction there is the foam balls, and the water cannons. Silver Dollar City needs a playground with more diversity in things to climb on, or under, or around, and more variety to interact with.
Also the Grand Exposition is a good place for the tots to find "kiddie rides," but then most of them are the same style of ride repeated over again (i.e., up, and down around a circle).