CAMPING
All 3 drive-in campgrounds are no longer first-come first-serve. All reservations must be made online at recreation.gov
Accessible campsites for campers with a disability are provided at each campground and are reserved for campers with a disability until 6 p.m. each evening. If, after 6 p.m. they are not filled, other campers may occupy the accessible campsite for that night only. Campsite should be vacated by 10 AM the next morning. Campers with a disability and holders of America the Beautiful Access Pass do not have to be in an accessible camp site to receive the pass discount.
This discount applies only to the camping fee. Not applicable for the electrical hook-up fee or group campsite fees.
America the Beautiful "National Parks and Federal Recreational Lands Pass" Access Pass - Free.
This is a lifetime pass for U.S. citizens or permanent residents with permanent disabilities. Documentation is required to obtain the pass. Acceptable documentation includes: statement by a licensed physician; document issued by a Federal agency such as the Veterans Administration, Social Security Disability Income or Supplemental Security Income; or document issued by a State agency such as a vocational rehabilitation agency. The pass provides access to, and use of, Federal recreation sites that charge an Entrance or Standard Amenity. The pass admits the pass holder and passengers in a non-commercial vehicle at per vehicle fee areas and pass holder + 3 adults, not to exceed 4 adults, at per person fee areas (children under 16 are admitted free). The pass can only be obtained in person at the park. The Access Pass provides a 50 percent discount on some Expanded Amenity Fees charged for facilities and services such as camping, swimming, boat launching, and specialized interpretive services. In some cases where Expanded Amenity Fees are charged, only the pass holder will be given the 50 percent price reduction. The pass is non-transferable and generally does NOT cover or reduce special recreation permit fees or fees charged by concessionaires.
http://www.nps.gov/piro/planyourvisit/upload/DriveInCampgrounds08.pdf