Last year we arrived around 7:30am. They weren't letting people in yet. We were about 30-40 people deep at the turnstyles. They started letting people in around 7:45am. I had my kids by the hand and we quickly walked to JTA sign-ups. There were CMs directing people where to go. Last year it was at Indiana Jones, but I heard it may be at the old Sounds Dangerously area this year? Either way there will be people telling you know where to go. Sign-ups were quick and we got a morning time right before lunch.
Now....there were people literally RUNNING to sign up, dragging their kids. CMs asked them to walk, which I'm sure their kids appreciated. While it seemed like there were a lot of people outside the turnstyles, once everyone got into HS they all kind of went their own way and were swallowed by the park. I think many were going to line-up for characters, get FPs for rides, and ride the "big" rides like TSM, ToT, and RnRc. After we signed up for JTA we went and rode all 3 of those rides with little to no wait.