I had a chance to buy a weekend ticket and also ride the track.
Hate to burst your bubble, but it'll be a parade lap at 35 mph. Considering how many hooligans will be there, I'd ride the FJR. Those side bags make good bumpers.
A couple years ago I did a parade lap around the track with several thousand Harleys. I laid back in the pack a little (riding two by two, next to, and in front of a buddy), and when I got onto the front stretch near the pit wall.... away from prying eyes (out of view of MYRIAD STATE TROOPERS ALONG THE TRACK, ON THE TRACK), I got a nice little wheelie.
I'd still recommend you ride the IMS, even though it ain't no hot lap. Riding the track is sweet. Have a blast!
Oh, and I also hope for your sake that I'm completely wrong about the 35 mph. Could be something totally different for MGP, but I wouldn't hold my breath or anything. Fingers crossed for ya!