What general route do you think you'll follow on the way up and back?
Bay Furnace NF CG is 4 miles W of Munising and right on Lake Superior. https://www.fs.usda.gov/recarea/hiaw...13284&actid=29
I have not camped there, but I've driven by. Seems like a good place. Some sites have views of the water.
Try to get a calm (not windy), sunny day for your boat tour of the shoreline. My favorite is the sunset cruise, for best lighting on the rocks.
Another CG which I've stayed at and liked is on the east end of the national lakeshore: Woodland Park Campground, Grand Marais MI
at Grand Marais. Good lake views. A little way west of town there is or was a sand dune that can be climbed. If you drive east of town about 4 miles (best I can recall of the distance), look for blueberry bushes along the road; if you're lucky they will be bearing wild blueberries. We picked 'em the first weekend in August when we were there.
Other things to see and do in the UP:
Historic buildings and artifacts at Fayette SP sw of Manistique
The Big Spring at Palms Book SP w of Manistique (water so clear you can see 40' to the bottom)
Tahquamenon Falls, near Paradise MI
Whitefish Point N of Paradise has a little lighthouse-turned-shipwreck museum
Soo Locks at Sault (pronounced 'soo') Ste. Marie: big ships making their way through the locks; tours.
Mackinac Bridge, a 5 mile long suspension bridge between upper & lower peninsulas
Mackinaw City, tourist town with many little shops in a compact walking area. Plenty of caramel corn and fudge and souvenirs. The local bakery a block north of the boat dock entrance has wonderful cinnamon bread and pecan rolls. Also a lighthouse and a fort.
West of Mackinaw City there's another lighthouse maybe 3 miles out of town, and then a few more miles west takes you to Wilderness SP. This is a 'dark sky' area, I believe, where you can see more stars than usual.
Mackinac Island: boat ride to an island with no motor vehicles, and another fort. Ride in a horse drawn carriage, or rent bikes and pedal around the entire island. More shops. More fudge and souvenirs!
McLain State Park (if you can get reservations)
Drive scenic M-26 to Copper Harbor.
Fort Wilkins... another fort
Porcupine Mountains SP: east unit has Lake of the Clouds, and west unit has a nice hike along the river with 3 modest waterfalls.
Ontonagon municipal CG is a nice place to stay, with sandy beach access and some sites have views.
Plenty of waterfalls all over the UP, but my favorites are Bond Falls near Paulding and Tahquamenon Falls.