Hi @Graf - Thanks for reaching out! We're hopeful some other community members familiar with Michigan will have some suggestions to pass along.
There are several sites along the River Loop Trail in Manistee NF. I'm hitting that in July.
I agree with what @Dad_Aint_Hip said. Other than that I haven’t seen much in lower MI, but if you get up to the UP, @Graf , I’d definitely recommend Tahquamenon Falls, the Porkies Mountains, and along Superior to the east of the Porkies and north of the Falls.