Hello, I am also in Iowa (north-central), I am very familiar with Cantril as my mom lives in the southeastern side of Iowa. There are several quilt shops that I like to venture to and one is in Ames (Quilting Connection) another is a shop in Goldfield (The Honey Barn). I recently did a project from the Kalona shop you mentioned. To be honest there are not too many shops that I don't enjoy going into as my stash will testify to that!
Happy Quilting! jkraft21