For the record, Craig Bohl did have a season on NDSU's staff in the 80's. He's not "one of us" at NDSU, but he wasn't a complete newbie to their program, either.
In the end it doesn't matter. Get the best coach (and staff) you can, regardless of where they went to school or coached in the past. UND connections do not need to be a prerequisite but also should not exclude anyone from being considered.