I got my SSI Open Water Certification and Nitrox certification while in college four years ago. And unfortunantly, I haven't been out diving since that summer. I have my BC/air tube and Regulator being tuned and maintainced this week and plan to take the Scuba Skills Refresher course before I leave for Hawaii next week. Will this be a sufficient refresher for the dive shops on Oahu to take me out? I really don't want to spend my time there taking classes if possible. Thanks for any knowledge you may have.