There is rather a lot of info about Navahos in the Wikipedia:
http://en.wikipedia.org/wiki/Navajo_peopleWhen the Spanish arrived, these people lived further East, in central NM. They were forceably moved to Bosque Redondo, and then allowed to return to the Canyon de Chelly. Later they were give the area surrounding the Hopi reservation.
The portable version of a hogan is called a wikiup, and is traditional to the Apaches and Utes, also tribes of the same Athabaskan linguistic group the Dine belong to.
The Hopi and Pueblo Indians are not Athabaskan, but the Navajo have learned many of their ways. You could say that the hogan, is an adobe version of the wikiup, a sort of synthesis of the Hopi and Navajo cultures.
Strangely, the name given to the largest group of Pueblo Indians is Anasazi, which is a Navajo word.
And the word Navajo seems to be a word used by the Pueblos to describe the Navajo, who call themselves the Diné.