We always show up around 15-20 mins early for ADRs, sometimes they’ll seat you early and sometimes not. I know for the HEA dessert party some people at the party with us said that they got there at 6:00 (in early Dec) and had their pick of tables, so you can show up way early apparently. And whenever you’ve had your fill of desserts they let you move to the FW viewing area, so you can pick your spot. Highly recommend the HEA party, very worth it.