Yes you can, there is a special gate that you go to that's marked for the Minnie's Breakfast. I don't recall what it says exactly, but they'll tell you when you make the reservation. Our first day we are staying offsite, and it is a MM day, which we don't have. MM is 9AM. Regular opening is 10AM that day. My ressies are for 9:10. You just go to that gate and they should have reservation list there.