These sites can be accessed by the Bright Angel Trail , and you 'll need a park service backcountry permit . Backpackers often experience national parks more intimately than other visitors . Studies and brief experiences in nature can enhance feelings of peace and vitality . Public hiking tours are available in some U.S. national parks .
Backpackers often experience national parks more intimately than other visitors . Studies and brief experiences in nature can enhance feelings of peace and vitality . Public hiking tours are available in some U.S. national parks .