We always stop at Westgate RV Campground because it is about halfway between Michigan and Florida. It is open 24 hours year round. It is easy on/off from I-75, just West of I-75 at Exit 41 in London KY.
The campground is AAA and Good Sam approved with Complete Full Hook ups. Both 30 and 50 amps electric, water, sewer, Wi-Fi, and picnic tables. Amenities include a playground area, a picnic shelter with bbq grill, and a large swimming pool.
There are lots of restaurants to choose from within walking distance (including a Cracker Barrel and a Waffle House) and the campground has cable tv.