Depends on the time you've got to kill, Lloyd. A walk on the pier is nice, dinner at Fitger's, visiting the museum near the harbor, or a half day trip to Split Rock lighthouse all come to mind. The original light keepers were a tough bunch of humans. Book a day trip with a charter on the lake. The fishing on Lake Superior is a bit slow, in my experience. Don't fall in, you got about thirty seconds before you pass out from the cold, and sink, if you do. That line from Gordon Lightfoot's song about the lake not giving up her dead is based on fact.
Puglesi's Gun Emporium is in Gary New Duluth, I think, might be worth a visit-I see him at the larger shows, and have never made the time to go to his store, I think you need to call in advance.
Let me know when you are going to be there, maybe we can break free and catch lunch. I owe you one.
Best,
Ted