Various stores, gas stations, going for a walk, etc. Zero "experiences" of any kind, occasional short stares.
I think the media did us a favor by spazzing out and hyper-publicizing the new carry law over the last year. Hardly anyone hasn't at least heard about it.
I'd like to mention to you that the IC ped mall is surrounded by property that is technically part of the university. You are probably aware of the confusing and indeterminate state of the interpretation of Iowa's law about weapons on public and private post-secondary school property -- just be aware of that.