To add to all of this great info, to any prospective dispersed campers: please use high-quality, recent, ideally official maps of your choosing to ensure you're on the sort of land you think you are. Boundaries can change and notes on spots aren't always up to date. My area involves a mix of national park, national forest, DNR land, and private land, and I regularly see dispersed campers getting ticketed for unwittingly setting up on the wrong side of the (unmarked) park boundary. That's tame compared to what can happen if you're trespassing on private land.