Here some info for the boatless people near St Clair/Detroit areas.
I found it on the Unimited webpage..

"Unlimited fans won't have to wait until August, though. A four-team exhibition will be run on the St. Clair River in St. Clair on June 24 from 11 a.m. to 1 p.m. as a test for a proposed 2004 race there.

The course will run from the north end of the St. Clair Inn to the Cargill Salt works on the south.

The four boats expected are the Miss Budweiser, Tubby's Grilled Subs, Oh Boy Oberto / Miss Madison and the Miss DYC presents the Greektown Casino / EMCOR. The boats will pit in an area next to the St. Clair Inn, and the test will be open to the public."