7:50am is when they let everyone in waiting in line for early ADR's and tours.
Be sure to give yourself enough time to get through security (bag check) and get in line.
Check-in right away at the podium (or send someone to check-in) and then take some photos. They won't call anyone for seating until 8:05am sharp, so if you get checked-in right away you will have some time for spectacular photos! You can get some pretty photos of the castle from in front of the restaurant as well.