We were at Discovery Cove the beginning of November. Let me first say DC is an amazing experience. Very close to WDW in terms of the park expericence, customer service, etc. We absolutely loved it! We did not do Sea Venture because my kids are 6 and 7. I saw people doing Sea Venture the day we were there, and it looked very cool. My kids were sad they were not old enough. You have a separate section of the Grand Reef for Sea Venture that is not accessible for other guests. I did not think much of it from the website, but was much more interested after seeing it in person.