Yes, you can go to seaworld before but once you go you start the seven day process. So if you go the 15 then 7 days after that will be your last you cannot split your seven days up ex. go the 15 that's one go the 16 that 2 days then go the 25th that's the third day, the 25 would be pass the 7 day mark. You go any day you want within those seven days. Just take your papers DC sent you to guest service at Seaworld and you will be fine.