I agree. It is a great plan. I recommend a couple of short excursions to start with. Lots of issues can be more easily dealt with near home.
Now is a good time for camping in Wisconsin. Pressure on campgrounds is decreasing, but still high, especially for electric sites. Most weekends are already booked for September in State Parks. Running generators are not allowed in State Parks.
All State Park sites require on-line registration until camping season is over.
Forest Service campgrounds are mainly in the northern part of the state. Most are first come first serve and on-site self registration. https://www.recreation.gov/
Later in September tree leaves will be turning in the Northern areas. Color lasts for about two weeks and slowly moves south.
Peninsula State Park north of Green Bay is a great place to stop for a while.
Wyalusing State Park where the Wisconsin river meets the Mississippi river is great on the western side of the state. It is worth a weeks stay. Hike the Bluff Trail.
There are hundreds of State Park and US Forest Service campgrounds. Most are worth a couple of nights stay. If you want more recommendations, just ask.
I wish you good luck and happy trails ahead!