Just got back from a week long car/camping trip.
Three places really stood out.
Camping on the banks of the Missouri River at Ponca State Park in northeast Nebraska. I was the only one at the camping area on the flood plain. It was on a wild section of the Missouri.
Blue Mounds State Park in Laverne, Minnesota. The trails up though the prairie at sunset were amazing. All kinds of wildlife, the heard of bison, the diversity of the plant life. I thought the prairie was a sea of grass, but the amount of flowers showed me I was mistaken.
And camping along the Mississippi River in Kentucky, Missouri, and Illinois. That river just fascinates me.