We stayed at the Mercer/ Grove City KOA this past weekend. Very nice facility. Lots of trees. The pool, store, and showers are nice. The staff is great! This KOA is close to interstate 80 and 79 in NW PA. There were many one night stop overs while we were there, so if anyone is traveling and looking for a stop over I'd give this KOA a very good rating. Also, 10 minutes from the KOA is outlet shopping, winery, lots of restaurants, and (most importantly to me
) a dirt track that runs sprint cars!