Any discount programs for disabled? Golden age?

Info on the America the Beautiful Pass is available at www.nps.gov.
The pass is free (Access Pass) to those who are 100% disabled, there is a charge if you apply for it thru the mail. The Senior pass is $10 and is also a lifetime pass. The pass covers National Parks, Forests, and BLM land. You generally get a 50% discount for camping, but there are exceptions.