I wondered about Sam Walton. He is actually Sam Walton Jr, who, along with his siblings, inherited Wal-Mart and Costco. He's the grandson of the founder. He moved to Flagstaff around 1999-2000 and started donating to local nonprofits. See my old article, Cash Cows Don't Graze: The Peculiar Relationship of Grand Canyon Trust and Wal-Mart at http://www.vlrc.org/articles/171.html.
In day-to-day dealings, he goes by another first name and uses Sam for legal type stuff. Does he live up there now, too?
In a quick Google search, I see that he's on the board (or was on the board) of the Environmental Defense Fund (the nation's largest legal group for environmentalists).
It's the Klamath River watershed Stakeholders have been identified but have not publicly stated why they are involved. Regarding big developers, not that we can see. However The Nature Conservancy... more