lexfly, I was in Traverse City last year at the end of June - first of July. I fished with Evan at The Northern Angler We had a great evening fishing the Hex spinner fall. I highly recommend Evan as a guide and TNA as a shop to help you jump start your trip.
Here are a couple links about our trip up there:
Fishing the Hex Spinner Fall
and
A Photo Tour of Sorts
{Fixed the links)
Hope this gets you started and let us know how it goes,
David