If you know any students there you could ask them to stop by admissions--one GSB guy I know told me he didn't mind helping out with my dirty work because with him being close to graduating there was nothing admissions could do to hurt him. And he wasn't going in there using my name so it couldn't hurt my case any.
When I went to the info session during my visit in November I asked the adcom member about the interview timeline and she didn't seem to mind...or maybe she remembered my name and made sure to ding me. You never know. Wear a fake nametag if you want to go that route, it couldn't hurt.
The R1 timeline was very open-ended...apparently interviews started about a month after the submission deadline, which was also about a month before the announcement date, and continued up through a week or so before the announcements came out.