Wilderness Camping Fees: Wilderness Camping Permits are required for all overnight trips into the Olympic National Park backcountry. The fee for each Wilderness Camping Permit is $8 per person per night plus a $6 per permit fee. Maximum group size is 12 people in most places. There is no charge for youth 15 years and under, but they still count towards group size. For more information on camping in wilderness see the Wilderness Trip Planner.