Fargo would work perfectly for me, as that's where I'm set up right now! I'd imagine most are in the cities. I know there is at least one head-fier in Duluth and I'm sure there are a few between St Cloud and Minneapolis as well. 4 hours either way doesn't seem to bad, though I know both are kind of a boring drive. Maybe with the amount of people we would be able to get, it may be worth the trip for more people. Just an idea though.
I don't think it would be too much trouble to set a place up either. There are some places possible at Concordia College that may work well. I guess it all really depends on the amount of interest.