Apparently there was no Viking Priesthood, only Chieftains who served as religious authorities; but even that is a misnomer as people paid homage to the gods that served them best. Thor, interestingly enough, was the common mans god in most regions, he was the most human. Freyja was fairly commonly worshiped as well, but Odin hardly at all.
We cannot know all this for a certainty, as very little remains of this ancient religion, only what comes down to us in the Icelandic Sagas and those are often contradictory...reinforcing the idea of no organized priesthood or religion. But we have such things as place names...their disbursement and organization tell us which gods were worshiped where. We also surmise where they worshiped by the early Christian proscriptions of places to avoid.
All very interesting. Odin One Eye, too clever for common man. Thor, thunder god, the everyman's god. Freyja, a fertility god.