If you can time it right, the Soo Locks have Engineer's Day on the last weekend of June. They open the buildings to the public and have demos and activities. There is a campground on the water called Anne Osburn (I think) but to get a reservation for that weekend you have to mail a check in early January.
We LOVED this spot! From there, we drove up to the Shipwreck Museum for a day trip - very interesting!
Don't know about any quilt shops, but I am sure someone else will...