Price: $5 (per group)
Afton State park is just past Woodbury, Southeast of the twin cities. It costs $5 per car to park there or $25 for a year long pass. Camp along the bluffs of the St Croix River. They have firewood, water, toilets, everything else. The views are spectacular. Fall is a good time to go to see the treeline across in Wisconsin. You have to hike about 1/2 mile from the parking lot to get to the camp site. Bring a cooler with some beer and look for a triple rainbow.