Michigan safe-anchor areas
Just got back from a week and a half cruise of the northwest Michigan shoreline and am unaware of anything like what you ask about. There are however several anchorages that have excellent protection and holding. Additionally there is one harbor that I know of and probably more that are considered "harbors of refuge". This means that they have to allow you to tie up. This frequently means that you will be rafting with other boats, sometimes three to four deep. Hope this helps.