Just feel the love from all the wreckreational divers here! Moneysavr, I have to admit I am one of those folks who spends a lot of time in quarries. We're the land o' lakes here in northern MN, thousands and thousands of them, but we've also got a lot of pit lakes left over from the mining days. They're deep, cold, clear (depending on the rains and the type of cutbank), and often have fun stuff to explore, structures left over from the mining operations. There's a huge community of divers in/around Brainerd MN that dive the Crosby pits along the Cuyuna range, but I'm further north along the Mesabi range and our pits remain mostly "undiscovered" by the diving world at large. But until the pit divers incorporate into their own sub-sub-forum (Rangers, mount up!) we definitely should be with you.
Here's a picture I dug up from last summer, but it shows you where I was diving in Superior on Sunday:
It's about a 100 yard surface swim from shore (a nice pebble beach) but the bouys aren't out yet this year. The MN state park system just finished a great new parking lot to access this wreck-- the lot is gated and reserved only for divers! You have to check in at the Split Rock Lighthouse office and get the combo. Here's another pick from that same day last summer, this is me on the Ely in Two Harbors:
You need a boat to reach this one, it's on the inside of the far breakwall just across the harbor. Check out this section of the MN Historical Society for info on these and many other wrecks along the north shore of Lake Superior:
http://www.mnhs.org/places/nationalregister/shipwrecks/index.html
You also may wish to check out the webpage for the Lake Superior Marine Museum Association in Duluth:
http://www.lsmma.com/
They host something called the "Gales of November" every year which is similar to your Ghost Ship Festival-- a bunch of divers and maritime buffs who get together for talks on all things related to Great Lakes shipping. This year it will be Nov 3-4.
Oh and I almost hate to say this NetDoc....I don't know what description you changed but the sticky which introduces the GLWC still doesn't include MN in its list of states....