Pre RD ADR

Curious, if I got a pre-RD ADR for 2, 855 on a 900 open day, can our family of 4 enter the park, 2 of us make the BoG and then 2 of us take a stroll in the park? How do they qualify the “enter as a large group”?

As far as I’m aware they check your reservation so only those with actual reservations will be allowed in early

That would make sense, just need to find 2 more then around the same time pre-9am to get us all in the park for a photo op, pre-play. We have ADR for all 4 at Bog but not until 9:30 so just past the mark. Thanks!