I have been enjoying Lake Erie frequently in recent years and so look forward to this circle trip. I know I can get to some important islands (including one with an example of giantism) and the birding is world class. Just think of Point Pelee so close to my hometown of Detroit!
Lake Erie Birding Trail has interactive map of the 312-mile Ohio shoreline with connection to their Tweets @LakeErieBirding. This website is chock full of detailed information about events, driving trails, and birding basics. Check out the link to Lake Erie Coastal Ohio Trail at bottom right of the map.