Well, I've never ridden the track at IMI, but I saw some photos of one of yer outings there. I'd be so down for givng it a try.... would be fun to take the old Kaw up there and flick it around some of those corners on a go-kart track. Er, and did you say it's only $20?
Fun! Sunday is prolly best, but I'd try for Saturday if you go.