I went to school at MSUM (just MSU then, because I'm old). The Bison were still D2 at the time, but the fuss people made about that team even then, you'd think they were Michigan or Ohio State.
Bison fans are delusional about their place in the college football pecking order and always have been. I have several good friends who are fans, so I've seen it a lot.
A decent number of them think they should be FBS, and from a competitive standpoint, they probably should be. But they don't understand why no conference is coming knocking on their door, begging them to join. Even lowly Conference USA, when they were desperate for survival bringing in Jacksonville and Sam Houston, both weaker, less known programs without much for fan bases, didn't seem all that interested in any of the Dakota four. Of course if you listen to the most vocal Bison fans, C-USA would be beneath them anyway.
The only two real options are the MWC and the MAC, and Fargo is fairly isolated from either. When UND in Grand Forks was in the Big Sky, they even had concerns with travel costs, and the two schools (along with all other public colleges in ND) are under the same governing board.