wbwood,
With that kind of thinking, do you suppose you should add your yearly vehicle registration fee, insurance fee, gallons of fuel used, tire wear loss, vehicle depreciation, etc to your yearly grocery costs broken down by how many times you went to the grocery store each year?
He purchased a yearly pass good for any Michigan State Park for that calendar year and he only lives 220 miles from Michigan not a thousand or more miles away. Of course he could just go to state's next to his like Wisconsin where the yearly entrance fee is $35 for non-residents or Indiana where the yearly fee is $60 for non-residents. And these fees come with a lot less parks to choose from!
Michigan's $30.50 for a yearly permit to over a hundred state parks sure isn't high then, is it?