Sam,
We live in Traverse City which is close to Interlochen. Feel free to give me a shout when you are here or close to the time (timberflint AT yahoo.com).
Cedar Rod and Gun has a SxS shoot every summer. Toward the end of July this year. Also there is a SxS Shoot at Action Shooting near Manton. Not sure the date but think it is toward the end of June. Also Charlevoix is a fine club with shoots on Wed, Sat, and Sun. Numerous SxS shooters there also.
Worth a stop at Fieldsport while you are in town also.