I most likely will be at SLU next year and I am from St. Louis. I either wanted to live in St. L or in Chicago. I believe you mentioned you have never lived in a small city/town before... well I have gone to school in Dayton, OH for the past four years and to be honest I am so sick of small towns, I can't wait to get back to St.L. I really like St Louis. It's a cool city, not as exciting as Chicago but it also is much less expensive, has less traffic, fun bars/places to go.
I have not had the opportunity to talk to as many students from SLU as I would like but the students I have talked to seem really happy there. I was a little worried before because on my tour there the students I talked to did not seem very excited about the school, but since then every student I have talked to say they love the community feel of SLU, are happy, etc.
But then again, I know nothing about the University of Vermont.