Just so there is no confusion:

For Kids National (anyone younger than Cadet) - You have to particiapte at the Southern Plains Regional to go to National. But you do not have to win or place.

For Cadet/Junior National (Fargo) - You do not have to go to the Southern Plains Regional tournament even though Southern Plains Regional has a Cadet division.

Las Vegas, New Orleans, etc is part of the Southern Plains Junior circuit.