While it is by no means close to being a done deal, I do think the BSC will give NDSU and SDSU a solid look. NDSU and SDSU do bring the fact that each are THE land grant schools in their respective states. This alone gives credibility to their admission to the conference. Sac State and Portland State are "second tier" schools in California and Oregon. I think it looks much better to have schools like North Dakota State, South Dakota State and Montana State in your conference.
The reality is that from a recognition and prestige perspective I don't think that UNO or Mankato State carry the same prestige in the NCC that do NDSU, UND, SDSU or USD. Because NDSU, UND, SDSU and USD are the premier institutions in thier respective states. When you get out of the region, most people have heard of NDSU or UND, but few have ever heard of Mankato State (or worse yet Minn. State Mankato).