gametime - here's ya some links to a few DIIs. Kentucky Weslyan is in KY and I believe in the same conference as NKU. I don't know anything about the school or it's baseball program.
U of Southern Indiana. I do know a tiny bit about it... my daughter may actually do a visit there. I know it's very reasonable in tuition rates and has great housing available. Academically, it isn't too selective which may be a good thing or a bad thing, depending on what you're looking for. It's in Evansville, IN which is a nice size town... easy to travel around and easy to access off of I64. It is also home of U of Evansville. Itsinthegame has a son there and I'm sure wouldn't mind sharing insight into the program. The field is on campus and sits in a secluded area by some woods... has a neat feel to it I thought! Campus is clean and is bigger than Bellarmine campus (see below). I believe the program has had some success, but Its could tell you in detail I'm sure.
Bellarmine University is in Louisville, KY and is a private catholic school. It is very pricey and a bit more selective in admissions that public DIIs. I don't know a lot about the program recently, but my son did visit there back in HS. It's a nice campus with field on site. Field isn't the best... no lights and needed some work the last time I saw it. The program has struggled, but may be on the upswing... I'm not sure. Housing is nice and school is in a very nice neighborhood and very easy to access off of I64 (those kinds of things are important to your parents!
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Bellarmine UniversityUniversity of Southern IndianaKentucky Weslyan