Several of my co-workers (USAF veterans) spent part of their enlistment there. I get the definite idea that it was not considered a plum assignment.
No it is not and neither is Minot. Actually, when I came back from Vietnam, I tried to change my assignment from Del Rio, TX to Grand Forks. I ended up going to TX anyway. Now that I think back, I am glad I went to TX. Grand Forks was a good place to grow up, but not to live. Many of my high school classmates still live in Grand Forks. I don't think my Philippine born wife, used to tropical weather, could take that cold either.