We are doing a two week US/IOA/seaworld trip in september (11-25th). The only chance we would have for HHN is the opening weekend fri/sat the 21/22. In past years has the opening weekend been extremely busy? We went halloween night in 2010 thinking it would be pretty quite, but halloween fell on a weekend night that year and it was PACKED, way way busier than the park had been that day. Anyway, I would like to do HHN again, but only if it's a mild/moderate sized crowd.