A large group should do just as 180 suggested. Get organized, set up camp, take shifts and blockade them in. Wood stoves in a tarp town.
If for no other reason then to see how long it takes the authorities to order the dismantle of a "white peoples camp".
At least we could finally answer, definitively, the question of "...how long do you think the blockade would last if whitey tried that?".
Then confront the media to report the obvious inequity. Stir up some shit or just bellyache about the injustice of it?!?!