During the summer months it will be really crowded on the weekends. During the weekdays it will be crowded but manageable. We went on a Monday and Tuesday and it was crowded, but we never had a problem getting a seat prior to a show. As far as the two rides its hit or miss. We rode the Kracken when the line was not long, then later rode the atlantis when there was no line. If you want to get a splash zone seat for The Shamu show, I would show up a half hour prior to show. Go and have a good time, even when its crowded its not that bad.