You'd be amazed how far inland the salt from the ocean can get inland and adversely effect the PH of the soil for not only Morels, but the trees they are symbiotic with. When I lived in SC I have found a few east of 95 but very very few and nothing consistent. Like many mushrooms they form a symbioses with specific trees which are less popular in your area. Trust me, I wish MI was literally my back yard, it's morel paradise there.
I too grow mushrooms but I don't try to grow morels. May take up to two years to get a flush and you also have to maintain the area the entire time. Not discouraging you, just be aware growing morels is usually a lot of work and time.
I will tell you Lions mane is a great mushroom to cultivate, it's easy to grow, you can grow it anytime of the year and even though many say it taste like lobster I think thats a marketing deal. I grow Lions mane year round cause well I just like them 
Best of luck to you!
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