I like this concept.
- Play your four rivals for 2H and 2A games per year.
- You see your rivals twice home and twice road in four years as it should be.
- Play the other eight on a rotating basis where over four years you see each of the eight once at home and once on the road.
That concept should make the west coast schools happy as they'd only be going to GF once every four years (assuming UND wouldn't have a west coast rival).
From a travel POV, yes, the most cost effective rivals (for them) for UND would be UNC, ISU, UM, and MSU.