If you were riding it at the same time I was sunday in the evening...that wasn't just a supervisor...that was the park president, Martindale himself. He was greeting people and asking how they enjoyed it and talking with ride attendants.
Sunday will be the best day to maximize your experience...as noted attendance is always lower. Plus that sunday is the first sunday the park stays open till 9pm....so more 2 hours to play.
My personal strategy would be to NOT hit the new giant at opening as everyone will still be rushing for it and causing it to have the longest lines of the day in the morning.
I'd hit up batman/mr freeze since they are on the farthest end of the park. Even though they were there when you came last they are still both great rides.