I think the idea of significant student loans is something you need to think about. If you were majoring in a field that paid well right off the bat, and that was in great demand in the current economy, then a moderate loan load might be worth it. However, I know young people who are now starting out in social work fields, and their pay is not very good, and there is not a lot of choice about jobs. I think taking on debt could be risky.
Have you spoken with anyone at MU about internship availability in your fields?
It's too bad there is a big financial difference. As the parent of a couple of college kids, I like to keep academics front and center. If there weren't any loans involved, I'd probably say SLU might serve your purposes better, but I'm wary of undergraduate loans. Having to pay those back might make a big difference as to when--or if--you can go on for a master's degree or other further training.