Following on from the Foxden post, webcomic fans might like to check out CLint Hollingsworth's Wandering Ones. Set in a post-apocalyptic 2066, this tale starts off fairly straight but gradually brings into play Native American spirituality; vision quests, spirit guides, even an appearance by ol' trickster Coyote himself. Hollingsworth is clearly a devotee of the outdoors life, and his work is quite detailed.

EDIT: The link takes you to the first episode rather than the home page.