Do Native Americans have a say?
The biggest Sioux tribe in the state at Ft. Yates, initially tried to shake down UND for more stuff (minority scholarships, Indian studies programs, etc.) and were unsuccessful. These were former corrupt tribal leaders, not the rank and file Sioux. The corrupt tribal leadership was voted out en mass and the current non-corrupt tribal leadership has taken a supportive position similar to their cousins at Ft. Berthold.
This is the reason which UND decided to reinstate the nickname and logo now in defiance of NCAA authority.
So the NCAA feelgood wennies are taking an action in opposition to the actual Sioux Tribes in North Dakota. Notwithstanding that, you may still find a few of them who still support the former corrupt tribal leadership's attempt to extract free stuff from UND in return for the support which the rank and file have already given.
For you non-Dakotans, Ft. Yates is south of Bismarck almost to the South Dakota line and almost as far away from UND as you can get and still remain in North Dakota.
Who do you think drew the Logo?