With chapter 7 in Michigan can I file bankruptcy on only my unsecured debt and keep my secured debt like my house, car, truck, and camper.

You can't pick and choose what debts to "file bankruptcy on," but, in most Chapter 7 cases, if you can and want to keep up the payments on secured debts, you can keep the security. Talk with a good lawyer to be sure about your situation and your eligibility for Chapter 7. Good Luck.