There are really good shows in Reading, PA and Oaks , PA. Both clean, climate controlled, and have real parking lots. You can get a full list of dates and address's at
Having been to every expo in PA at least twice these are the shows I go to. Hamburg is crowded, hot, unsanitary, and the parking lot is a dirt field. I will never again be going there. Steel City is ok but very far away. Cheswick and Mars are very small.