UP of Michigan state parks

I know what you mean. The MI state parks are definitely more geared to the social camper. While I tend to prefer a more private setting, these "open lawns" are still nice.

I seem to recall a few nicely-treed, somewhat private campsites in McLain SP. Heading north up the 1-way loop, there were some near the end of the loop before turning left and returning back south. McLain is right on the big lake. If you go, be sure to drive up the western side of that peninsula for some great scenery.

(edit: looks like kknowlton and I were typing at the same time!)

Some of the sites at McLain are set off from each other by trees, though not all. Porcupine Mt was a big disappointment to us in this regard too - after driving for miles through thick pine forests, we came upon this wide-open CG with almost no trees. :(

Anyway, our site at McLain was #60. Our 34' TT barely fit in it, but it at least was semi-private. Other sites I marked as "good" (but I can't guarantee that meant they had trees between them & the next sites - though that is our preference as well): 72,73,77,49,90,91,23,27,46,26.

Hope this helps. Our experience with Michigan SPs was not as good, in general, as with Wisconsin ones either, for similar reasons to the one you cite. Good luck! (You will probably need to reserve a site in advance, BTW - Michigan SPs are pretty popular!)

P.S. Being used to wooded sites with lots of privacy, living in the West takes a little getting used to. :)