We will be going to US August 12 for four nights, we are thinking about spending one more night in FL (we are from WV), but we can't decide whether we want to add an extra day to US or spend a day at Seaworld. We've never been to Seaworld and I think it looks nice, but my only concern is the heat in the middle of August, at least at US/IOA we can take a mid-afternoon break (we are staying on site). We will have three kids with us, ages 13, 11 and 8. So what would you recommend?