Don't bother.

The Lakhota have their war ponies at the ready to go to war w/ the corp profiteers/socialist polluters (taxpayers will be stuck w/ the clean-up bill/s)
Paid war ponies by other corporate sponsors. See organizations financed by billionaires play a "Rent a Chief" or "Rent a Tribe" to lend authenticity to their enviro whacko goals.
And the paid off tribes to be anti pipeline have nooooooooooo problemo taking big money. And they have no problem either in trying to prevent other tribes from negotiating in good faith for corporations to use their land.
Just had one up here that was busted. A "Rent a Chief" scenario for a Chief to appear with Neil Young.
Allan Adam, from the Athabasca Chipewyan First Nation. Tides paid him $55,000. for one night on stage with Neil.
Not bad eh?