Did Native Americans live on the RES have auto insurance?

I was told that if they live to the matter, they do not need car insurance, I do not think so.

Lakota Oglala Sioux on my dream as a reservation stated, we do not need auto insurance. But how small is my reservation, and we must constantly stay on the road, it is necessary to have car insurance. But everything depends on the tribe and the region in which they are ready.