I really wish WSM wasn't on the opposite side of town from me! Went for the first time today and I love the amount of variety in terms of meats, produce, bakeries, etc. The prices are super reasonable and even the shoppers are pleasant to deal with (I moved from Philly and dealing with people in Reading Terminal wasn't always fun). Make sure to carry some cash on you because some vendors are cash only (others will take credit cards). I'm thinking I'll be making more trips out here for sure!
In terms of parking, follow the signs to the lot behind the market, it's free as long as you can find a spot (it gets crowded on Saturdays!)