I would have to agree with Tom R. You should be able to do a Google search for Lake Erie Shores and Islands and I believe they're also on Facebook. In fact I think they're one of my Liked Pages. Try that first as they're pretty good at answering questions.
Search "Lake Erie Shores and Islands". Toward the top right you will find a link called "Shore Savings". Click that and you can print your own card.
I am not sure, have never used it
I have never used one, but they are available at the welcome centers.
Welcome Center - East, 4424 Milan Rd., Ste. A, Sandusky
Welcome Center - West, 770 S.E. Catawba Rd., Port Clinton
You can print your own Shore Card at shores and islands online.
Get quick answers from Miller Boat Line staff and past visitors.