DC @ 8:00AM/Shuttle @ 10:00 AM ???

[Dislifer]

I just found out that Discovery Cove opens at 8:00 AM. So, I want to get there at 8:00 so I can book my swim with the Dolphins ASAP. I have also heard that if you take the shuttle there from RPH the earliest one arrives at Discovery Cove around 10:00 AM. So, if I take a taxi to Discovery Cove and pay the $30 fare, I can still take the shuttle back...right?????
Thanks for any help/advice!