Nice! I'm signed up for the same event. Did the last two up in Wisconsin, and they were a blast.
-get a group of friends to do it with you, it's a team oriented course.
- stay away from long distance running
- sprints 2-3 days a week, increasing the distance each week. 50 yds,100 yd etc
- strength work the other days.
I didn't do any specific training for the event, just do crossfit 6 days a week.