I predict a Sioux sweep. It is going to be a great weekend!
Head out early, take a shuttle bus to the game, and party afterwards! Take a taxi home. Great times.
A few years back, I was on the El Roco shuttle bus on friday night that had about 10 gopher fans on it talking trash, yelling out the rouser, etc. There was a group of 4 or 5 young UND students that nearly went back and pummeled these gopher fans who looked to be in their 30s and 40s, but it never materialized, (luckily) they just started a "f the gophers" and "lets go sioux" chant to overcome the other chants.
It's a great rivalry, just make sure you don't get too stupid (on either side).