I went Memorial Day Weekend (Saturday) last year, and I didn't think the lines were that bad.
I booked a hotel room, and got two day passes about three weeks before they announced this event (besides the weather forecast, I'm a little worried). Sigh. Someone always has to tinkle on my parade.
Were was at the same park. I was there that Saturday and It was jammed packed. They had cars parking in the grass. I think I rode two maybe three rides all day long.