Does anyone know of a "Free" Parking Lot near the Anaheim Convention Center?

I will be at a 3-day conference at the convention center. It will cost me $10/day to park there. So, I am looking for alternatives. I was thinking about parking at local stores, but afraid of getting car towed. Does anyone know of any "free" parking lots? Or reduced parking-fare at other lots close to the center. Thanks. :-)