Can You Backpack In Yosemite?

Can You Backpack In Yosemite? A wilderness permit is required year-round for backpacking, overnight climbing, or any other overnight stay in the Yosemite Wilderness. A wilderness permit is not required for day hikes (unless hiking to Half Dome) or for staying in lodging facilities and frontcountry campgrounds. What do you need to backpack in Yosemite?