Yes, wild camping is allowed in Wisconsin in county forests, state forests, and national forests. Wild camping, typically described as primitive or dispersed camping away from designated campgrounds without facilities, is available within Nicolet National Forest and Chequamegon National Forest, including at Porcupine Lake Wilderness, Rainbow Lake Wilderness, and Blackjack Springs Wilderness. Some Wisconsin River islands are managed by the Bureau of Land Management (BLM), meaning that the ones that are public land are open to camping. Some state parks feature a small number of backpacking campsites, and you can find more private, secluded camping in Wisconsin with Hipcamp.