Just did this two weeks ago. We got to the IG for an early tour at 8:20. There was already a huge line of people waiting. They were keeping everyone behind the bag check line - they had not even started checking bags yet.
I had to go up to the gates and ask someone what to do - there was not anyone with a list of people with early tours and dining reservations. They sent us to the front of the bag check line and then inside the park.
It was not very well organized - the cm wanted to scan my magic band for the tour verification. I told her that would do no good, it wasn't linked to my
MDE account. I happened to have the confirmation number with me and she seemed OK with that.