For starters, congratulations on being accepted. I remember the whole college admissions process, and knowing that there's at least one school out there that wants you is an incredibly relieving feeling.
Don't take this as criticism; I'm only playing devil's advocate, but in my mind, I think that you should attend the best school you possibly can. If UND is that school, that's fantastic, because they offer exactly the programs you want and you will love (well hopefully, at least!) your decision.
However, if you could get into a better school, I would say to go for it. I, along with everyone else here on a.net, have a true passion for airlines and the aviation industry, and I know that there is no other job I would enjoy more than working in the management of an airline. While I could have applied to Embry-Riddle or UND for their aviation management programs, I knew that Dartmouth would have opened far more doors for me in the future. I mean this in no way as criticism of ERAU or UND, but it's just something to think about. And if for whatever reason, a job in the industry doesn't work out for me, I'll have a heck of a lot more to fall back upon in the future.
[Edited 2007-01-22 06:28:35]