You could go on the Chicago fb page and ask if they'll create a separate, official one for Rockford. Or maybe you (or someone else) could just create one for Rockford since an incoming M1 made one for Peoria (see below). I'm sure people would appreciate it.
Now that I think about it, last year the admins at Urbana created the group for UPR students. They were extremely organized and shared a ton of information. I guess since Urbana's gone now, no one really took over the job of creating fb pages for the other campuses.
BTW, it's a bummer that you didn't get the campus you wanted, but, hey, you got into med school! How awesome is that?