Confident? No, as I haven't watched college hockey in years. I know that BU is the most talented of those teams, has the most history and tradition of those teams, and has proven that they are the best team throughout the season.
Hockey is a sport where the same few teams from the power conferences win the title every year, and the only one on that list who fits those characteristics is BU. UND lost to UNH, UM lost to AF (BWAHAHAHAHA), Denver lost to Miami, ND lost to Bemidji. All the teams remaining are lower seeds (two #4 seeds!!!) except for BU.
Degenerates are going to be all over Vermont thinking "they beat BU twice earlier in the year at their place". I can't think of a sport where home court means less than in hockey (soccer?). It's hard to think a team as talented as BU would let a Vermont team that is new to this Frozen Four stuff beat them in a game that would end their season.
I'd like to think Bemidji State could win as well. However that's simply from myself guessing that the majority of Bemidji's team is from Minnesota (where the talent is), and my bias against Miami watching them in the CCHA the past years. I really am not someone to follow in college hockey.