I'm in the same boat - Minnesota resident but was also accepted to Iowa. When I interviewed at Iowa everyone seemed happy and welcoming whereas Minnesota was dark (no natural lighting!!) and gave off a weird vibe. That might have just been the way the interview day was structured though (and the fact that the students weren't in school that day). I've also heard some concerning things from dentists I've shadowed that went to UMN. On the other hand, I've heard great things about the school and program, but it's the only school that a dentist has told me not to attend (this dentist did not attend UMN though). I know I would get a great education either place, and dental school won't be easy and joyful all the time no matter where I go.
I'm 99% sure I'll be attending UMN SoD in August. I am extremely excited about it but tend to overthink things! 🙂
There are more things going on in the Twin Cities than in Iowa City if that's important to you! Also, I am going with the idea that if you hope to practice in MN, it would be beneficial to already be established in the state when you graduate.