8:30 is pushing it, and then you’re not riding until the evening. You can’t get a boarding group until after you’ve cleared security and tapped into the park. That could easily take 15 minutes. If you want to guarantee that you’re riding ROTR you should not shoot for getting there at 8:30.Today they had spots open until 8:45 AM and then they hit capacity. So, as long as you’re there before 8:30 the latest, you’ll be fine. I’ve been studying it the last few days.