The tournament began back in 1945 in St. Paul. After a stop at the home of the Minnesota North Stars, the Met Center, for eight years in the 1970's, the tournament returned to St. Paul at the new St. Paul Civic Center, known for it's clear boards, which you can see below in one of today's videos. For nearly 50 years the tournament was played as an eight team, single class tournament, which lent itself to classic David versus Goliath matchups, as the smaller schools from the northern part of the state travelled down to the big city, taking on some of the largest schools attendance-wise in the state.
Those private schools are considered to have the advantage of being able to recruit the best players to attend their schools rather than take what comes their way in the case of the traditional public schools who draw students from their local geographic region. This "class war" is an age old argument between the public and private schools and is only magnified with the arrival of a smaller school from the north, such as when tiny Roseau makes an appearance in St. Paul, and is one of the driving forces behind the ongoing popularity of the tournament, as every great drama must have its villain.