Yes they charge to park,I have a Platinum pass so I get free parking but I once stayed at the Hilton Garden Inn right next door to the Renaissance hotel and opted to walk as the Hilton Garden Inn and the Renaissance are literally across the street from the Sea World parking lot.From both of these hotels it's no more than a 5 minute walk to the park.I didn't know the Renaissance charged to park,it kinda beats the purpose of it being so close,the Hilton Garden Inn did not charge parking and is a nice hotel but not anywhere as nice as the Renaissance.