Most of Lake Clark National Park and Preserve qualifies under that definition of wilderness.
All camping is primitive, no facilities or designated campsites exist.
Use Leave No Trace guidelines to minimize your impacts. Backcountry permits for camping and hiking are not required, however there are rules and regulations governing one's behavior in all national park areas. Become familiar with them. Resist the urge to take, shape or alter the wilderness around you. A further caution then, take it upon yourself to be extremely knowledgeable and prepared.