Some of the "ejects" and ditches were near center of Lake Michigan--roughly 600' deep in places. Others were in 50' to 75' not far off shore, mainly rookie pilots trying to make the beach, but anyone who grew up there (not necessarily the pilots) knows those aren't Miami kinds of beaches, these are narrow beaches with plenty of sand dunes. The lake back then was also about 1/2 mile smaller than it is now. The lake has always had ebbs and flows back to the ice age, so in 2010, the beach is far more inland than it was in 1942 or even 1962 when I was a kid, so they are in slightly deeper water now.
Also, no records of exactly where each plane went down was kept. If there was any log it would be the Coast Guard guys who were radioed to come pick them up. Sometimes private boaters even picked up a pilot or two. Don't forget usage of the Great Lakes for commerce boating (moving ore, coal, etc., was far more used than in this day of 18 wheelers.
These planes in the Great Lakes, and Lake Michigan especially, are in FAR better states than any plane that went down in warm salt water.
These planes are a gift. Every one that can be retrieved and restored will be a fantastic memorial to the men & women who sacrificed so much in WWII.