The water off the Keweenaw is never very warm, so a dry suit is not a bad idea. Bottom temperature was about 40 degrees Farenheit in September of 1995, and I saw some Lake Trout around the wreck. The Langham makes a nice dive because it lies in relatively sheltered waters. Boats can be launched very nearby at Lac La Belle marina. The Langham makes a nice companion dive to the Mesquite.
Dive charters are also available locally.