I'm sorry I don't have a phone number, but you could surely get some leads by calling your state emergency services office, or by contacting the Minnesotaa NG, which surely has some informal linkages.
Or youi can write
Information Systems Command
Central Area ARmy Mars Director
ATTN: ASOP-HF-CA
Ft. Sam Houston, TX 78234-5000
I do, too, have a phone number. 1-800-531-1114 ext 3840. The director is a Mr. Leon Ritter, but anyone at the extension (be sure to ask for it) can help you. They can also tell you who the MN direcvtor is and send you any applications to join.