I, for one, don't mind the hockey program branding "North Dakota" because ANY college hockey fan will tell you they immediately recognize the name. Tell folks you're a fan of "North Dakota football" and you're bound to hear back "Yea, the Bison are awesome!" from anyone outside of the state. The football team definitely needs to market "Fighting Hawks" while the hockey team is well-known around the country already.
That being said, the logos should definitely appear somewhere on the ice.