What wreck sites you want to go to will depend on just what you want. For pure historic value I would recommend Lady Elgin. For the best wreck penetration and exploration, S.S. Wisconsin will not dissapoint you and there is so much there that you will never fully explore her. Visibility is best in the spring when 100 ft is not very unusual but is good away from shore, harbors and rivers most of the summer months. Visibility north of the 42nd parallel and more than one mile off shore averages 40 ft.
I checked out your web site. Your photography is first rate. With one who knows the wrecks pointing you in the right direction, you could find picture opportunities on any of our wrecks. My favorite picture taken on the great lakes is one of a diver with the wooden stock anchor of the schooner, St. Mary. She rests in 105 feet of water off of Highland Park. The Photograph was taken by Joe Oliver and hangs on the wall of my office. The anchor of Lady Elgin is also very photogenic, as is the paddle wheel of Seabird.