As long as you are going that way....
From Devil's Lake, you have to stop at the Circus Museum in Baraboo. We have been there twice.
We have also been to House on the Rock and decided that the artists were very impressed by themselves. None of collected pieces were labeled. We haven't been back, (once was enough).
The EAA Museum at Oshkosh might be out of your way.
If you have not been to the Maritime Museum at Manitwoc, this is your chance.
You should stop at the Pestigo Fire Museum. Never heard of it? It was the same time as the Chicago Fire, but the telegraph lines burned down and nobody heard about it for a week. Roughly 1200 people are thought to have died, but nobody actually knows. 1800 square miles burned and It was so hot it jump Green Bay to the Door Paninsula.
Speaking of Green Bay. The National Railroad Museum there is worth the stop.
Up by Marquette is the Michigan Iron Museum. It is a good stop. Don't believe the address, look for the signs on Rt41.
Leaving Marquette on Rt 28 headed for Munising is a place called Lakenenland. A mad sculptor has been at work for a while. That gets you to Munising and Munising Falls are not a long hike, but the dog can go both there and the Upper and Lower Tahquaninan Falls. It is a good hike between the falls and if one way is all you want, you and the dog can ride back to where you started in the van that makes the run for just that purpose. (You do have to pay for the ride.) Our dog was dragging by the time we got to the lower.
The pictured rocks are best seen from a boat and they are not that expensive.
As long as you are going to Tahquaninan, you should go up to the Shipwreck Museum at Whitefish Point. Parts of that I didn't go into because I lost friends on the Fitz and it still hurts.
If you are going by the locks, go to Live Ships Map - AIS - Vessel Traffic and Positions
and see when ships are coming through. There is a peanut gallery where you can watch them lock though. There is also the Museum Ship Valley Camp and a nice camp ground called the Soo Locks Campground. They have nice showers and coffee in the morning. The River of History Museum is closed on Sunday.
Once you get south of the bridge, you are in wine country. Tasting rooms are everywhere. Remember you are driving.....
The Leelanau has some amazing cellars.
Now, on your way out of Traverse City, aim for Glen Arbor, but when you get there continue on to Glen Haven. The Cannery Boat Museum is there, but that is not what you want. What you want is to go up to the trailhead and do the loop that takes you through the Ghost Forest.
I don't how your coach will handle it, but the Pierce Stocking Scenic drive is well worth the time. From here south, you can go hiking in the dunes all the way to Frankfort. Then if you go inland to the Pere Marquette State Forest, there is more.
A little farther south is the Nordhouse Dunes NF, we have never had time to stop there.
If you get to Grand Haven in the evening - any evening - stop by to see the fountains play. It is a pretty good show and they only ask a donation.
Well I've about gotten you around the lake and back to civilization.
So, I will quit here and someone else fill things in.