I've been everywhere in the BigTen, along with Notre Dame, except Nebraska and Illinois. I'm definitely going to Lincoln the next time Michigan plays there, since I already promised to get tickets for the UM-NU game in Ann Arbor next year to a Husker friend, who said he'd do the same.
I definitely plan to go to Austin, Pasadena, and Blacksburg when Michigan plays there in the next decade. I'm hoping to go Seattle and Norman as well.... If Michigan had series against Georgia, Tennessee, LSU, or Texas A&M, I'd go to any of those places, too.